Sverre A. C. Kittelsen

• Anthun, Kjartan Sarheim; Kittelsen, Sverre A.C. & Magnussen, Jon (2017). Productivity growth, case mix and optimal size of hospitals. A 16-year study of the Norwegian hospital sector. Health Policy.  ISSN 0168-8510.  121(4), s 418- 425 . doi: 10.1016/j.healthpol.2017.01.006 Full text in Research Archive. Show summary

  Background and objectives This paper analyses productivity growth in the Norwegian hospital sector over a period of 16 years, 1999–2014. This period was characterized by a large ownership reform with subsequent hospital reorganizations and mergers. We describe how technological change, technical productivity, scale efficiency and the estimated optimal size of hospitals have evolved during this period. Material and methods Hospital admissions were grouped into diagnosis-related groups using a fixed-grouper logic. Four composite outputs were defined and inputs were measured as operating costs. Productivity and efficiency were estimated with bootstrapped data envelopment analyses. Results Mean productivity increased by 24.6% points from 1999 to 2014, an average annual change of 1.5%. There was a substantial growth in productivity and hospital size following the ownership reform. After the reform (2003–2014), average annual growth was <0.5%. There was no evidence of technical change. Estimated optimal size was smaller than the actual size of most hospitals, yet scale efficiency was high even after hospital mergers. However, the later hospital mergers have not been followed by similar productivity growth as around time of the reform. Conclusions This study addresses the issues of both cross-sectional and longitudinal comparability of case mix between hospitals, and thus provides a framework for future studies. The study adds to the discussion on optimal hospital size.

• Brekke, Kjell Arne; Golombek, Rolf; Kaut, Michal; Kittelsen, Sverre A.C. & Wallace, Stein W. (2017). Stochastic energy market equilibrium modeling with multiple agents. Energy.  ISSN 0360-5442.  134, s 984- 990 . doi: 10.1016/j.energy.2017.06.056 Full text in Research Archive. Show summary

  The energy markets are characterized by many agents simultaneously solving decision problems under uncertainty. It is argued that Monte Carlo simulations are not an adequate way to assess behavioral uncertainty; one should rather rely on stochastic modelling. Drawing on economics, decision theory and operations research, a simple guide on how to transform a deterministic energy market equilibrium model - where several agents simultaneously make decisions - into a stochastic equilibrium model is offered. With our approach, no programming of a stochastic solution algorithm is required.

• Edvardsen, Dag Fjeld; Førsund, Finn R & Kittelsen, Sverre A.C. (2017). Productivity development of Norwegian institutions of higher education 2004–2013. Journal of the Operational Research Society.  ISSN 0160-5682.  68(4), s 399- 415 . doi: 10.1057/s41274-017-0183-x Show summary

  Productivity growth of institutions of higher education is of interest for two main reasons: education is an important factor for productivity growth of the economy, and in countries where higher education is funded by the public sector, accountability of resource use is of key interest. Educational services consist of teaching, research and the ‘‘third mission’’ of dissemination of knowledge to the society at large. A bootstrapped Malmquist productivity change index is used to calculate productivity development for Norwegian institutions of higher education over the 10-year period 2004–2013. The confidence intervals from bootstrapping allow part of the uncertainty of point estimates stemming from sample variation to be revealed. The main result is that the majority of institutions have had a positive productivity growth over the total period. However, when comparing with growth in labour input, the impact on productivity varies a lot.

• Johannessen, Karl-Arne; Kittelsen, Sverre A.C. & Hagen, Terje P. (2017). Assessing physician productivity following Norwegian hospital reform: A panel and data envelopment analysis. Social Science and Medicine.  ISSN 0277-9536.  175, s 117- 126 . doi: 10.1016/j.socscimed.2017.01.008 Full text in Research Archive.
• Kittelsen, Sverre A.C.; Anthun, Kjartan Sarheim & Huitfeldt, Ingrid Marie Schaumburg (2017). Kvalitet og produktivitet i norske sykehus. Michael.  ISSN 1893-9651.  14, s 75- 85 Full text in Research Archive. Show summary

  I følge økonomisk teori vil sterke incentiver knyttet til kostnadsreduksjon kunne gå på bekostning av tjenestenes kvalitet, i det minste hvis tjenesteprodusentene driver effektivt, og incentiver knyttet til kvantitet bør derfor balanseres med belønning av kvalitet. Artikkelen er en bearbeiding av de norske dataene fra den nordiske studien på sykehusnivå i EU-prosjektet EuroHOPE for årene 2008 og 2009. Norske sykehus har høy kvalitet målt ved en klart lavere dødelighet enn de andre nordiske landene. Derimot er reinnleggelsesraten høy i Norge, og produktiviteten lavere enn i Finland og Danmark. Vi finner en signifikant positiv samvariasjon mellom produktivitet og kvalitetsindikatorer for dødelighet i nordiske sykehus, men ingen signifikante sammenhenger i de norske dataene. Kun reisetid har klar sammenheng med produktivitetsestimatene.

• Førsund, Finn R; Edvardsen, Dag Fjeld & Kittelsen, Sverre A.C. (2015). Productivity of tax offices in Norway. Journal of Productivity Analysis.  ISSN 0895-562X.  43(3), s 269- 279 . doi: 10.1007/s11123-015-0435-1
• Heijink, Richard; Engelfriet, Peter; Rehnberg, Clas; Kittelsen, Sverre A.C. & Häkkinen, Unto (2015). A window on geographic variation in health care: Insights from EuroHOPE. Health Economics.  ISSN 1057-9230.  24, s 164- 177 . doi: 10.1002/hec.3287
• Kittelsen, Sverre A.C.; Anthun, Kjartan Sarheim; Goude, Fanny; Huitfeldt, Ingrid Marie Schaumburg; Häkkinen, Unto; Kruse, Marie; Medin, Emma; Rehnberg, Clas & Rättö, Hanna (2015). Costs and quality at the hospital level in the nordic countries. Health Economics.  ISSN 1057-9230.  24, s 140- 163 . doi: 10.1002/hec.3260 Full text in Research Archive. Show summary

  This article develops and analyzes patient register-based measures of quality for the major Nordic countries. Previous studies show that Finnish hospitals have significantly higher average productivity than hospitals in Sweden, Denmark, and Norway and also a substantial variation within each country. This paper examines whether quality differences can form part of the explanation and attempts to uncover quality–cost trade-offs. Data on costs and discharges in each diagnosis-related group for 160 acute hospitals in 2008–2009 were collected. Patient register-based measures of quality such as readmissions, mortality (in hospital or outside), and patient safety indices were developed and case-mix adjusted. Productivity is estimated using bootstrapped data envelopment analysis. Results indicate that case-mix adjustment is important, and there are significant differences in the case-mix adjusted performance measures as well as in productivity both at the national and hospital levels. For most quality indicators, the performance measures reveal room for improvement. There is a weak but statistical significant trade-off between productivity and inpatient readmissions within 30 days but a tendency that hospitals with high 30-day mortality also have higher costs. Hence, no clear cost–quality trade-off pattern was discovered. Patient registers can be used and developed to improve future quality and cost comparisons. Copyright © 2015 John Wiley & Sons, Ltd.

• Kittelsen, Sverre A.C.; Winsnes, Benny Adam; Anthun, Kjartan Sarheim; Goude, Fanny; Hope, Øyvind Børslid; Häkkinen, Unto; Kalseth, Birgitte; Kilsmark, Jannie; Medin, Emma; Rehnberg, Clas & Rättö, Hanna (2015). Decomposing the productivity differences between hospitals in the Nordic countries. Journal of Productivity Analysis.  ISSN 0895-562X.  43(3), s 281- 293 . doi: 10.1007/s11123-015-0437-z Show summary

  Previous studies indicate that Finnish hospitals have significantly higher productivity than in the other Nordic countries. Since there is no natural pairing of observations between countries we estimate productivity levels rather than a Malmquist index of productivity differences, using a pooled set of all observations as reference. We decompose the productivity levels into technical efficiency, scale efficiency and country specific possibility sets (technical frontiers). Data have been collected on operating costs and patient discharges in each diagnosis related group for all hospitals in the four major Nordic countries, Denmark, Finland, Norway and Sweden. We find that there are small differences in scale and technical efficiency between countries, but large differences in production possibilities (frontier position). The countryspecific Finnish frontier is the main source of the Finnish productivity advantage. There is no statistically significant association between efficiency and status as a university or capital city hospital. The results are robust to the choice of bootstrapped data envelopment analysis or stochastic frontier analysis as frontier estimation methodology.

• Brekke, Kjell Arne; Golombek, Rolf; Kaut, Michal; Kittelsen, Sverre A.C. & Wallace, Stein (2013). Modellering av usikkerhet i numeriske likevektsmodeller med stokastisk scenariometode :. Samfunnsøkonomen.  ISSN 1890-5250.  127(2), s 16- 26 Full text in Research Archive.
• Golombek, Rolf; Brekke, Kjell Arne & Kittelsen, Sverre A.C. (2013). Is electricity more important than natural gas? Partial liberalizations of the Western European energy markets. Economic Modelling.  ISSN 0264-9993.  35, s 99- 111 . doi: 10.1016/j.econmod.2013.06.023
• Golombek, Rolf; Kittelsen, Sverre A.C. & Rosendahl, Knut Einar (2013). Price and welfare effects of emission quota allocation. Energy Economics.  ISSN 0140-9883.  36, s 568- 580 . doi: 10.1016/j.eneco.2012.11.006
• Medin, Emma; Häkkinen, Unto; Linna, Miika; Anthun, Kjartan Sarheim; Kittelsen, Sverre A.C. & Rehnberg, Clas (2013). International hospital productivity comparison: Experiences from the Nordic countries. Health Policy.  ISSN 0168-8510.  112(1-2), s 80- 87 . doi: 10.1016/j.healthpol.2013.02.004 Show summary

  This article focuses on describing the methodological challenges intrinsic in international comparative studies of hospital productivity and how these challenges have been addressed within the context of hospital comparisons in the Nordic countries. The hospital sectors in the Nordic countries are suitable for international comparison as they exhibit similar structures in the organisation for hospital care, hold administrative data of good quality at the hospital level, apply a similar secondary patient classification system, and use similar definitions of operating costs. The results of a number of studies have suggested marked differences in hospital cost efficiency and hospital productivity across the Nordic countries and the Finnish hospitals have the highest estimates in all the analyses. Explanatory factors that were tested and seemed to be of limited importance included institutional, structural and technical. A factor that is yet to be included in the Nordic hospital productivity comparison is the quality of care. Patient-level data available from linkable national registers in each country enable the development of quality indicators and will be included in the forthcoming hospital productivity studies within the context of the EuroHOPE (European health care outcomes, performance and efficiency) project.

• Golombek, Rolf; Kittelsen, Sverre A.C. & Haddeland, Ingjerd (2012). Climate change: impacts on electricity markets in Western Europe. Climatic Change.  ISSN 0165-0009.  113(2), s 357- 370 . doi: 10.1007/s10584-011-0348-6 Show summary

  This paper studies some impacts of climate change on electricity markets, focusing on three climate effects. First, demand for electricity is affected because of changes in the temperature. Second, changes in precipitation and temperature have impact on supply of hydro electric production through a shift in the inflow of water. Third, plant efficiency for thermal generation will decrease because the temperature of water used to cool equipment increases. To find the magnitude of these partial effects, as well as the overall effects, on Western European energy markets, we use the multi-market equilibrium model LIBEMOD. We find that each of the three partial effects changes the average electricity producer price by less than 2%, while the net effect is an increase of only 1%. The partial effects on total electricity supply are small, and the net effect is a decrease of 4%. The greatest effects are found for Nordic countries with a large market share for reservoir hydro. In these countries, annual production of electricity increases by 8%, reflecting more inflow of water, while net exports doubles. In addition, because of lower inflow in summer and higher in winter, the reservoir filling needed to transfer water from summer to winter is drastically reduced in the Nordic countries.

• Golombek, Rolf; Kittelsen, Sverre A.C. & Rosendahl, Knut Einar (2012). Tildeling av klimakvoter i Europa :. Samfunnsøkonomen.  ISSN 1890-5250.  126(2), s 30- 37
• Iversen, Tor & Kittelsen, Sverre A.C. (2012). Challenges in health care financing and provision. Nordic Economic Policy Review.  ISSN 1904-4526.  2 . doi: 10.6027/TN2013-514
• Golombek, Rolf; Greaker, Mads; Kittelsen, Sverre A.C.; Røgeberg, Ole Jørgen & Aune, Finn Roar (2011). Carbon Capture and Storage Technologies in the European Power Market. Energy Journal.  ISSN 0195-6574.  32(3), s 209- 237 . doi: 10.5547/ISSN0195-6574-EJ-Vol32-No3-8 Show summary

  We examine the potential of Carbon Capture and Storage (CCS) technologies in the European electricity markets, assessing whether CCS technologies will reduce carbon emissions substantially in the absence of investment subsidies, and how the availability of CCS technologies may affect electricity prices and the amount of renewable electricity. To this end we augment a multi-market equilibrium model of the European energy markets with CCS electricity technologies. The CCS technologies are characterized by costs and technical efficiencies synthesized from a number of recent CCS reviews. Our simulations indicate that with realistic values for carbon prices, new CCS coal power plants become profitable, totally replacing non-CCS coal power investments and to a large extent replacing new wind power. New CCS gas power also becomes profitable, but does not replace non-CCS gas power investment fully. Substantially lower costs, through subsidies on technological development or deployment, would be necessary to make CCS modification of existing coal and gas power plants profitable for private investors.

• Golombek, Rolf; Kittelsen, Sverre A.C.; Løfsnæs, Ole & Schemde, Arndt von (2011). Hvordan påvirkes kraftsektoren av klimaendringer?. Samfunnsøkonomen.  ISSN 1890-5250.  (3), s 55- 62
• Medin, Emma; Anthun, Kjartan Sarheim; Häkkinen, Unto; Kittelsen, Sverre A.C.; Linna, Miika; Magnussen, Jon; Olsen, Kim & Rehnberg, Clas (2011). Cost efficiency of university hospitals in the Nordic countries: a cross-country analysis. European Journal of Health Economics.  ISSN 1618-7598.  12(6), s 509- 519 . doi: 10.1007/s10198-010-0263-1 Show summary

  This paper estimates cost efficiency scores using the bootstrap bias-corrected procedure, including variables for teaching and research, for the performance of university hospitals in the Nordic countries. Previous research has shown that hospital provision of research and education interferes with patient care routines and inflates the costs of health care services, turning university hospitals into outliers in comparative productivity and efficiency analyses. The organisation of patient care, medical education and clinical research as well as available data at the university hospital level are highly similar in the Nordic countries, creating a data set of comparable decision-making units suitable for a cross-country cost efficiency analysis. The results demonstrate significant differences in university hospital cost efficiency when variables for teaching and research are entered into the analysis, both between and within the Nordic countries. The results of a second-stage analysis show that the most important explanatory variables are geographical location of the hospital and the share of discharges with a high case weight. However, a substantial amount of the variation in cost efficiency at the university hospital level remains unexplained.

• Halsteinli, V; Kittelsen, Sverre A.C. & Magnussen, Jon (2010). Productivity growth in outpatient child and adolescent mental health services: The impact of case-mix adjustment. Social Science and Medicine.  ISSN 0277-9536.  70(3), s 439- 446 . doi: 10.1016/j.socscimed.2009.11.002
• Linna, Miika; Häkkinen, Unto; Peltola, Mikko; Magnussen, Jon; Anthun, Kjartan Sarheim; Kittelsen, Sverre A.C.; Rød, Anette; Olsen, Kim; Medin, Emma & Rehnberg, Clas (2010). Measuring cost efficiency in the Nordic Hospitals-a cross-sectional comparison of public hospitals in 2002. Health Care Management Science.  ISSN 1386-9620.  13(4), s 346- 357 . doi: 10.1007/s10729-010-9134-7
• Førsund, Finn R; Kittelsen, Sverre A.C. & Krivonozhko, Vladimir E (2009). Farrell revisited-Visualizing properties of DEA production frontiers. Journal of the Operational Research Society.  ISSN 0160-5682.  60(11), s 1535- 1545 . doi: 10.1057/jors.2008.185
• Edvardsen, Dag Fjeld; Førsund, Finn R & Kittelsen, Sverre A.C. (2008). Far out or alone in the crowd: a taxonomy of peers in DEA. Journal of Productivity Analysis.  ISSN 0895-562X.  29(3), s 201- 210 . doi: 10.1007/s11123-007-0066-2 Show summary

  A method is presented for classifying strongly efficient units in DEA as interior or exterior, and as self-evaluators or active peers. The exterior strongly efficient units are found by running the enveloping procedure “from below”. There is no firm production-function evidence of the efficiency of exterior self-evaluators. Interior self-evaluators are more likely to have active peers as neighbours in more directions and may therefore represent technology. When performing a second stage regression analysis of efficiency scores, exterior self-evaluators should be removed. The proportion of exterior active peers also provides information on whether the variable specification is supported by the data.

• Hagen, Terje P.; Iversen, Tor & Kittelsen, Sverre A.C. (2007). Ga prioritering og konkurranse høyere kostnadseffektivitet? En analyse av laboratorie- og røntgenvirksomheten, I: Oddvar Martin Kaarbøe & Terje Lie (red.),  Resultatevaluering av sykehusreformen. Tilgjengelighet, prioritering, effektivitet, brukermedvirkning og medbestemmelse.  Norges forskningsråd.  ISBN 978-82-12-02395-6.  Kapittel.
• Førsund, Finn R; Edvardsen, Dag, Fjeld; Hansen, Wiljar; Kittelsen, Sverre A.C. & Neurauter, Thor (2006). Productivity and regulatory reform of Norwegian electricity distribution utilities, In Tim Coelli & Denis Lawrence (ed.),  Performance measurement and regulation of network utilities.  Edward Elgar Publishing.  ISBN 9781845423179.  Chapter 5.  s 97 - 131
• Førsund, Finn R; Lindseth, Frode; Kittelsen, Sverre A.C. & Edvardsen, Dag Fjeld (2006). THE TAX MAN COMETH-BUT IS HE EFFICIENT?. National Institute Economic Review.  ISSN 0027-9501.  197(July), s 106- 119
• Halsteinli, Vidar; Kittelsen, Sverre A.C. & Magnussen, Jon (2005). Productivity Growth in Norwegian Psychiatric Outpatient Clinics for Children and Youths. Journal of Mental Health Policy and Economics.  ISSN 1091-4358.  8(4), s 183- 191
• Kittelsen, Sverre A.C. & Magnussen, J (2005). The Journal of Mental Health Policy and Economics. Journal of Mental Health Policy and Economics.  ISSN 1091-4358.  8(4), s 183- 191
• Førsund, Finn & Kittelsen, Sverre A.C. (2001). empiriske forskningsresultater om effektivitet i offentlig tjenesteproduksjon. Oekonomisk Forum.  55(6), s 22- 29
• Førsund, Finn & Kittelsen, Sverre A.C. (1998). productivity development of norwegian electricity distribution utilities. Resource and Energy Economics.  ISSN 0928-7655.  20(3), s 207- 224 Show summary

  When regulating electricity distribution utilities, estimates of the past productivity improvement performance are very important for future requirements. A piecewise linear frontier technology, reflecting observed best practice, accommodating the multi-output nature of distribution utilities is specified. A Malmquist index and its components, shift in frontier technology and change in efficiency, have been calculated for the period 1983 to 1989. The main results are a positive productivity growth averaging nearly 2 per cent per year, and that this is mainly due to frontier technology shift. Outliers are scrutinised, but do not influence results for non-outliers.

• Torgersen, Arne Martin; Førsund, Finn & Kittelsen, Sverre A.C. (1996). Slack-adjusted efficiency measures and ranking of efficient units. Journal of Productivity Analysis.  ISSN 0895-562X.  7(4), s 379- 398 Show summary

  When using a piecewise linear frontier production function as a reference for calculating efficiency measures, total potentials for improvement are often not revealed by calculating radial efficiency measures of the Farrell type only. The paper develops efficiency measures extending the radial measures to include slacks, and also suggests a method for ranking efficient units according to their importance as benchmarks for inefficient units. The new measures are applied to a typical many dimensions - small sample problem of a cross section data set for Norwegian state run employment offices.

View all works in Cristin

• Anthun, Kjartan Sarheim; Kittelsen, Sverre A.C. & Magnussen, Jon (2016). Produktivitet i spesialisthelsetjenesten.
• Kittelsen, Sverre A.C. (2016). Scale and quality in Nordic hospitals.
• Hoel, Michael Olaf; Kittelsen, Sverre A.C. & Kverndokk, Snorre (2015). Pareto Improving Climate Policies: Distributing the Benefits across Generations and Regions.
• Hoel, Michael Olaf; Kittelsen, Sverre A.C. & Kverndokk, Snorre (2015). Pareto Improving Climate Policies: Distributing the Benefits across Generations and Regions.
• Kittelsen, Sverre A.C. (2015). Scale and quality in Nordic hospitals.
• Kittelsen, Sverre A.C. (2013). Comparing Nordic Hospital efficiency and productivity.
• Kittelsen, Sverre A.C. (2013). Decomposing the Productivity Differences between Hospitals in the Nordic Countries.
• Kittelsen, Sverre A.C. (2013). Quality and Productivity in Nordic Hospitals.
• Kittelsen, Sverre A.C. (2012). Decomposing the Productivity Differences between Hospitals in the Nordic Countries.
• Rygh, Liv Helen; Helgeland, Jon; Braut, Geir Sverre; Bukholm, Geir; Fredheim, Nanna; Frich, Jan C; Halvorsen, Marit; Kittelsen, Sverre A.C.; Magnus, Trine; Nguyen, Khang N.; Thesen, Janecke & Tjomsland, Ole (2010). Forslag til rammeverk for et nasjonalt kvalitetsindikatorsystem for helsetjenesten.
• Rygh, Liv; Helgeland, Jon; Braut, Geir Sverre; Bukholm, Geir; Fredheim, Nanna; Frich, Jan C.; Halvorsen, Marit; Kittelsen, Sverre A.C.; Magnus, Trine; Nguyen, Khang Ngoc; Thesen, Janecke & Tjomsland, Ole (2010). Forslag til rammeverk for et nasjonalt kvalitetsindikatorsystem for helsetjenesten. Rapport fra Kunnskapssenteret. 16/2010.
• Halsteinli, Vidar; Kittelsen, Sverre A.C. & Magnussen, Jon (2008). Productivity growth in Outpatient Child and Adolescent Mental Health Services: The impact of case-mix adjustment.
• Kittelsen, Sverre A.C.; Magnussen, Jon; Anthun, Kjartan Sarheim; Häkkinen, Unto; Linna, Mika; Olsen, Kim Rose; Rehnberg, Clas & Medin, Emma (2008). Hospital productivity and the Norwegian ownership reform - A Nordic comparative study. HERO skriftserie / Working paper. 10.
• Hagen, Terje P.; Iversen, Tor & Kittelsen, Sverre A.C. (2007). Laboratorie- og røntgenvirksomheten i kjølvannet av sykehusreformen: Mer privatisering og lavere kostnader?. HERO skriftserie / Working paper. 2.
• Kittelsen, Sverre A.C. & Magnussen, Jon (2007). Hospital reform and hospital efficiency - a Nordic Comparative Study.
• Kittelsen, Sverre A.C.; Magnussen, Jon & Anthun, Kjartan Sarheim (2007). Sykehusproduktivitet etter statlig overtakelse: En nordisk komparativ studie. HERO skriftserie / Working paper. 1.
• Linna, Miika; Häkkinen, Unto; Magnussen, Jon; Kittelsen, Sverre A.C. & Rehnberg, Clas (2007). Comparing efficiency between Nordic Hospitals.
• Førsund, Finn R; Kittelsen, Sverre A.C. & Lindseth, Frode (2006). EFFICIENCY AND PRODUCTIVITY OF NORWEGIAN TAX OFFICES.
• Førsund, Finn R; Kittelsen, Sverre A.C. & Lindseth, Frode (2006). Productivity of tax offices in Norway.
• Førsund, Finn R; Kittelsen, Sverre A.C.; Lindseth, Frode & Edvardsen, Dag Fjeld (2006). The tax man cometh-but is he efficient?.
• Kittelsen, Sverre A.C.; Magnussen, Jon; Häkkinen, Unto; Linna, Miika; Medin, Emma; Nicolaisen, Jeppe; Rehnberg, Clas & Rød, Anette (2006). Hospital Financing and Efficiency in the Nordic Countries.
• Kittelsen, Sverre A.C.; Magnussen, Jon & Hernæs, Kjersti (2006). Quality, efficiency and scope in Norwegian Hospital Production.
• Magnussen, Jon; Kittelsen, Sverre A.C. & Hernæs, Kjersti (2006). Quality, efficiency and scope in Norwegian hospital production.
• Magnussen, Jon; Seppälä, Timo; Kittelsen, Sverre A.C.; Häkkinen, Unto; Rehnberg, Clas & Rød, Anette (2006). Efficiency aspects of Nordic Hospital Systems.
• Hagen, Terje P.; Iversen, Tor & Kittelsen, Sverre A.C. (2005). ”Kartlegging av produksjon og kostnader til offentlige og private leverandører av laboratorie- og røntgentjenester.” HERO Skriftserie 2005: 14.
• Førsund, Finn & Kittelsen, Sverre A.C. (2000). On the calculation of Farrell efficiency measures: the evolvment of linear programming. Show summary

  The evolvement of the use of linear programming in DEA analyses from Farrell to Boles

• Torp, Hege; Edvardsen, Dag Fjeld & Kittelsen, Sverre A.C. (2000). Evaluering av formidling : en effektivitetsanalyse av arbeidskontorenes samlete virksomhet basert på DEA. Rapport – Institutt for samfunnsforskning. 2000:8. Full text in Research Archive. Show summary

  Den gjennomsnittlige effektiviteten i de lokale enhetene i aetat er 87 prosent. Dette er resultatet av en analyse basert på data fra 1998 for praktisk talt samtlige arbeidskontorer i Norge.Formålet med studien er å beskrive effektivitetsfordelingen i arbeidsmarkedsetaten. En slik beskrivelse identifiserer både de arbeidskontorene som utnytter tilgjengelige ressurser på en effektiv måte når de produserer tjenester for arbeidsgivere og arbeidssøkere, og de ikke- effektive arbeidskontorene. Kunnskap om hva som kjennetegner de effektive arbeidskontorene setter oss på sporet av hva de ikkeeffektive arbeidskontorene kan lære av de effektive, for å bli mer lik dem. Den beregnede gjennomsnittseffektiviteten på 87 prosent innebærer at dersom alle arbeidskontorene var 100 prosent effektive, ville det være mulig å opprettholde produksjonen av tjenester med en ressursinnsats tilsvarende 87 prosent av dagens ressursinnsats. En etteranalyse av effektivitetstallene viser at om lag 35 prosent av variasjonen i effektivitet mellom arbeidskontorene kan forklares ved forskjeller i forholdene på det lokale arbeidsmarkedet. Det meste av variasjonen er med andre ord forskjeller i ren effektivitet.

• Magnussen, Jon & Kittelsen, Sverre A.C. (1999). Testing DEA Models of Efficiency in NOrwegian Psychiatric Outpatient Clinics.
• Kittelsen, Sverre A. C. (1998). Using Data Envelopment Analysis to measure production efficiency in the public sector. Økonomiske doktoravhandlinger. 45. Show summary

  Avhandlingen er skrevet innen fagområdet produksjonsteori og viser hvordan metodeapparatet som går under navnet datainnhyllingsanalyse (DEA) kan gjøres anvendelig i målingen av effektivitet og produktivitet innen offentlig sektor. Metoden kan utvikles til å ha et statistisk fundament, og kan i stor grad gi vesentlig informasjon om ressursbruk i enkeltsektorer. Innenfor sektorer som norske domstoler, arbeidskontorer og elektrisitetsdistribusjon er det i arbeidet med avhandlingen funnet betydelig ineffektivitet, samtidig som det er gitt informasjon som kan bidra til å forbedre effektiviteten i disse sektorene. Effektivitet sier noe om hvor god ressursutnyttingen er i forhold til det som er mulig. Produktivitet er et beslektet begrep som på en mere beskrivende måte uttrykker forholdet mellom produksjon og ressursbruk, men også her kreves en målestokk for produktivitetsnivået. Hvis en privateid sektor produserer flere produkter eller har flere målsettinger, er det vanlig å veie sammen disse ved hjelp av markedsprisene. Produktene i offentlig sektor omsettes ofte ikke på markeder, og en har da ikke priser som kan brukes som vekter ved beregning av effektivitet og produktivitet. I stedet kan en bruke informasjon om teknologien, dvs det fysiske mulighetsområdet for omforming av ressurser til produkter. I komplekse prosesser og i tjenesteyting er det ikke mulig å skaffe ingeniørmessig informasjon om teknologien; derfor må en basere seg på å anslå teknologien fra observasjoner av faktisk atferd. DEA er en metode for å anslå teknologien utfra atferden til de beste (mest effektive) enhetene. I motsetning til alternative metoder, legges det liten struktur på teknologianslaget på forhånd, men metoden har en del andre svakheter. Spesielt er det et problem at metoden er følsom for målefeil, og at statistiske tester inntil nylig ikke har vært tilgjengelige. Avhandlingen setter fokus på ulike svakheter ved DEA-metoden, og hvordan en eventuelt kan forbedre den. Hvis en har få observasjoner, vil en f. eks. ha vanskelighet for å avsløre ineffektivitet fordi mange enheter vil bli målt som effektive. Avhandlingen tar for seg hvordan en kan modifisere metoden for likevel å avsløre forskjeller mellom de effektive enhetene. Samtidig er det lagt vekt på å vise hvordan en for de ineffektive enhetene får informasjon om hvilke effektive enheter som kan tjene som forbilder. Resultatene er anvendt på norske by- og herredsretter og på arbeidskontorene. Avhandlingen tar også for seg statistiske tester som er foreslått i litteraturen, og gjennomfører storskala simuleringer for å finne om testene har de ønskede egenskapene. Resultatene er oppmuntrende for metoden, ettersom testene i stor grad har utsagnskraft, samtidig som det er viktig med flere observasjoner enn i alternative metoder. Disse funnene blir anvendt på norske elektrisitetsfordelingsverk for å finne ut hvilke variable som bør inngå når en måler effektivitet og produktivitet. Eksempelvis ble det ikke funnet grunn til å ta hensyn til klimaforskjeller når en allerede har tatt hensyn til energimengden, abonnenttallet og forsyningsarealets utstrekning.

• von der Fehr, Nils-Henrik M.; Førsund, Finn & Kittelsen, Sverre A.C. (1996). The Zambia RPED Study: Report no III.

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