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Hellmer, Stefan
Publications (10 of 10) Show all publications
Hellmer, S. (2013). Price responsiveness in district heating: single houses and residential buildings — a cross-sectional analysis. ISRN Economics, 324127
Open this publication in new window or tab >>Price responsiveness in district heating: single houses and residential buildings — a cross-sectional analysis
2013 (English)In: ISRN Economics, ISSN 2090-8938, p. 324127-Article in journal (Refereed) Published
Abstract [en]

Price responsiveness is argued to be one important factor determining the possibility for a natural monopoly such as a district heating company to exercise its monopoly power. Increased price responsiveness, measured, for example, by the own price elasticity, reduces monopoly power, as consumers increasingly reduce demand as a response to a price increase. However, consumers in single houses having individual metering have presumably higher price responsiveness compared to consumers in residential buildings using collective metering. One major question raised in this paper is thus whether single houses show larger price responsiveness compared to residential buildings. Using cross-sectional data for 187 networks in Sweden for the year 2007 indicates that even if single houses have higher price responsiveness, district heating reveals in general a very inelastic behavior.

National Category
Economics
Identifiers
urn:nbn:se:hkr:diva-10366 (URN)10.1155/2013/324127 (DOI)
Available from: 2013-04-09 Created: 2013-04-09Bibliographically approved
Hellmer, S. & Ekstrand, J. (2013). The iron ore market in the early twenty-first century: the impact of the increasing Chinese dominance. Mineral Economics, 25(2-3), 89-95
Open this publication in new window or tab >>The iron ore market in the early twenty-first century: the impact of the increasing Chinese dominance
2013 (English)In: Mineral Economics, ISSN 2191-2203, E-ISSN 2191-2211, Vol. 25, no 2-3, p. 89-95Article in journal (Refereed) Published
Abstract [en]

China's increased participation in the global market for iron ore has had tremendous impacts of various kinds. The ore has changed routes and destinations. In 2010, China had reached a point at which it alone accounted for over 50% of the global trade of iron ore. These large changes are unavoidably mirrored in the price that rose dramatically following the Chinese increased demand for iron ore. It was only Brazil and Australia that responded with higher production, an increased production that in no way did cover the increased demand from China. As Australia and Brazil increased their respective export to China, they both reduced their export to almost every other country such as the US, Germany and France who all have reduced their steel production. Other exporting countries like India, Canada and Sweden could not respond fast enough to the demand increase since these countries did not have the ability to adjust their respective production in the immediate and short run. These countries have, as a consequence, gained economic rent due to higher prices and are expected to reinvest in order to increase production in the near future.

Place, publisher, year, edition, pages
New York: , 2013
Keywords
Iron ore, China, LKAB, Market dominance
National Category
Economics
Identifiers
urn:nbn:se:hkr:diva-9718 (URN)10.1007/s13563-012-0021-1 (DOI)
Available from: 2012-09-18 Created: 2012-09-18 Last updated: 2017-12-07Bibliographically approved
McIntosh, C. & Hellmer, S. (2012). Necessary and sufficient conditions in merger control: the use of HHI and threshold value. Applied Economics, 44(7), 867-878
Open this publication in new window or tab >>Necessary and sufficient conditions in merger control: the use of HHI and threshold value
2012 (English)In: Applied Economics, ISSN 0003-6846, E-ISSN 1466-4283, Vol. 44, no 7, p. 867-878Article in journal (Refereed) Published
Abstract [en]

This article considers two coarse measures applicable to antitrust policy: one of market concentration, the Herfindahl–Hirschman Index (HHI) and one of market dominance, threshold value. Calculations of threshold value are compared to HHI values to determine when thresholds might be of specific use in merger cases. Many scenarios which satisfy the threshold conditions (indicating a dominant firm exists) are consistent with high HHI numbers such that current US Department of Justice and European Commission guidelines (based on HHIs) for merger concerns will have been met. It is suggested as a rule of thumb that HHIs be used as necessary conditions and threshold value be considered sufficient conditions for further case review.

National Category
Economics
Identifiers
urn:nbn:se:hkr:diva-9098 (URN)10.1080/00036846.2010.524632 (DOI)
Available from: 2012-02-27 Created: 2012-02-27 Last updated: 2017-12-07Bibliographically approved
Hellmer, S. (2012). Student autonomy and peer learning: an example. Högre Utbildning, 2(1), 51-54
Open this publication in new window or tab >>Student autonomy and peer learning: an example
2012 (English)In: Högre Utbildning, ISSN 2000-7558, E-ISSN 2000-7558, Vol. 2, no 1, p. 51-54Article in journal (Other academic) Published
Abstract [en]

This short article presents and describes a transition from "traditional" teaching with knowledge transferred from the teacher to the students in a classroom to a peer-to-peer situation in which the students, with different support, learn from each other. The process and results are encouraging and the peer-to-peer approach will be used and developed further in economics courses.

Keywords
student autonomy, peer-to-peer learning
National Category
Pedagogical Work
Identifiers
urn:nbn:se:hkr:diva-9221 (URN)
Available from: 2012-04-12 Created: 2012-04-12 Last updated: 2017-12-07Bibliographically approved
Aronsson, B. & Hellmer, S. (2011). Existing legislative support assessments for DHC. Brussels: Ecoheat4EU
Open this publication in new window or tab >>Existing legislative support assessments for DHC
2011 (English)Report (Other (popular science, discussion, etc.))
Abstract [en]

This report is a country by country assessment of the supports and barriers for district heating and the subsequent effects they have on the sector nationally. This is an analysis of information gathered by the national partners of this project from 10 or more experts and combined with the extensive knowledge and experience of the 14 national partners. These reports can be found on the web in Country by Country database and should be consulted when further information on a specific country is desired (ecoheat4.eu/en/Country-by-Country-DB).

Place, publisher, year, edition, pages
Brussels: Ecoheat4EU, 2011. p. 57
National Category
Social Sciences
Identifiers
urn:nbn:se:hkr:diva-9099 (URN)
Projects
Ecoheat4eu
Available from: 2012-02-27 Created: 2012-02-27 Last updated: 2012-02-27Bibliographically approved
Hellmer, S. (2011). Är du lönsam lilla småhus?: användarflexibilitet och lönsamhet för fjärrvärme i flerbostadshus, en tvärsnittsanalys. Ekonomisk bebatt, 39(3), 28-37
Open this publication in new window or tab >>Är du lönsam lilla småhus?: användarflexibilitet och lönsamhet för fjärrvärme i flerbostadshus, en tvärsnittsanalys
2011 (Swedish)In: Ekonomisk bebatt, ISSN 0345-2646, Vol. 39, no 3, p. 28-37Article in journal (Other academic) Published
Abstract [sv]

En låg prisrespons hos konsumenter är en av förutsättningarna för ett naturligt monopol, som ett fjärrvärmeföretag, skall kunna utnyttja sin monopolställning. Fjärrvärme säljs företrädesvis för uppvärmning till flerbostadshus och småhus där småhusen har individuell mätning av förbrukningen medan flerbostadshusen har kollektiv mätning av förbrukningen. En grundläggande hypotes i denna studie är att småhusägare har en högre användarflexibilitet än konsumenter i ett flerbostadshus. I analysen används tvärsnittsdata för 187 fjärrvärmeverk i Sverige för året 2007 och resultatet indikerar att småhusägaren uppvisar en tydligt högre priselasticitet jämfört med flerbostadshuset. Analysen visar dessutom att varje ytterligare småhus som kopplas på i fjärrvärmenätet genererar en resultatminskning medan varje ytterligare flerbostadshus genererar en tydlig uppgång av rörelseresultatet för fjärrvärmeföretaget på orten.

National Category
Economics
Identifiers
urn:nbn:se:hkr:diva-9096 (URN)
Available from: 2012-02-27 Created: 2012-02-27 Last updated: 2012-02-27Bibliographically approved
Svensson, M. & Hellmer, S. (2010). Internet auctions and time: does the race against minute limits influence the auction outcome?. Paper presented at INFRADAY 2010.
Open this publication in new window or tab >>Internet auctions and time: does the race against minute limits influence the auction outcome?
2010 (English)Conference paper, Published paper (Refereed)
Abstract [en]

Internet based auctions have become popular and has become a forum for both rational and emotional driven decisions to buy or not to buy. This study focus the analysis on if and to what extent the auction time might influence the final, price winning, bid. The auctions showed a relative value increase as the time frame for the auction decreased. At the same time there was no significant difference between the numbers of bids in short relative the long auctions that could explain the increase in value. The result is discussed in terms of how time might influence, positively or negatively, economic rationality.

Keywords
Internet, Auctions, winning bid, time, emotions
National Category
Economics and Business Psychology
Identifiers
urn:nbn:se:hkr:diva-9119 (URN)
Conference
INFRADAY 2010
Available from: 2012-03-05 Created: 2012-03-05 Last updated: 2012-03-05Bibliographically approved
Hellmer, S. (2010). Switching costs, switching benefits and lock-in effects: the reregulated Swedish heat market. Energy and Environment, 21(6), 563-575
Open this publication in new window or tab >>Switching costs, switching benefits and lock-in effects: the reregulated Swedish heat market
2010 (English)In: Energy and Environment, ISSN 0958-305X, E-ISSN 2048-4070, Vol. 21, no 6, p. 563-575Article in journal (Refereed) Published
Abstract [en]

The paper argues for and defines a locked-in consumer as a consumer that is involuntary locked into one system in spite of an economic incentive to change. A locked-in consumer is therefore not seen as a loyal consumer but instead is assumed to be loyal to a system in spite an obvious economic gain of switching. Being defined as a natural monopoly in its technique, district heating has long been criticized for its eventual abuse of this monopoly position. Therefore, assuming well functioning ex-ante competition, the study calculates switching costs for switching from district heating to pellet burners or heat pumps. The analysis show that there exist relatively substantial benefits of switching from district heating to pellet burning or heat pumps, especially in residential urban areas. With limited available relevant markets, district heating being the only alternative, this negative switching cost cannot be capitalized and represents, in the assumed absence of loyal customers, a lock-in effect. The result indicates that we cannot reject the idea that the district heating plants serving residential areas inStockholm misuse their dominant position resulting in a reduction of the social welfare.

Place, publisher, year, edition, pages
Essex: Multi-Science Publishing, 2010
Keywords
district hating, switching costs, lock-in
National Category
Economics
Identifiers
urn:nbn:se:hkr:diva-9093 (URN)10.1260/0958-305X.21.6.563 (DOI)
Available from: 2012-02-27 Created: 2012-02-27 Last updated: 2017-12-07Bibliographically approved
Svensson, M., Hellmer, S. & Robson, I. (2010). Är det ditt slutgiltliga bud?: temporala effekter på pris i internetauktioner. Ekonomisk debatt, 38(7), 5-15
Open this publication in new window or tab >>Är det ditt slutgiltliga bud?: temporala effekter på pris i internetauktioner
2010 (Swedish)In: Ekonomisk debatt, ISSN 0345-2646, Vol. 38, no 7, p. 5-15Article in journal (Other academic) Published
Abstract [sv]

Internetbaserade auktioner har letat sig in i ”folkhemmet”. Auktionerna har också blivit ett forum för rationellt såväl som emotionellt drivna köpbeslut. I denna studie analyseras huruvida auktionstiden (119 auktioner; 58 presentkort och 61 konsertbiljetter) är en prispåverkande faktor. Auktionerna visade en relativ värdestegring (slutbudet dividerat med det begärda priset) när tidsra­men för auktionen krympte. Samtidigt fanns det inte någon signifikant skill­nad mellan antalet bud i långa respektive korta auktioner som kunde förklara värdestegringen. Resultaten diskuteras mot en bakgrund av hur tid bidrar till, alternativt, motverkar ekonomisk rationalitet.

National Category
Economics
Identifiers
urn:nbn:se:hkr:diva-9095 (URN)
Available from: 2012-02-27 Created: 2012-02-27 Last updated: 2012-02-27Bibliographically approved
Hellmer, S. & Linda, W. (2009). On the evaluation of market power and market dominance: the Nordic electricity market. Energy Policy, 37, 3235-3241
Open this publication in new window or tab >>On the evaluation of market power and market dominance: the Nordic electricity market
2009 (Swedish)In: Energy Policy, ISSN 0301-4215, E-ISSN 1873-6777, Vol. 37, p. 3235-3241Article in journal (Refereed) Published
Abstract [en]

This paper studies different concentration and dominance measures using structural indexes used to initially screen the competitive situation in a market. The Nordic and Swedish electricity markets are used as the empirical cases. Market concentration issues in the Nordic electricity market in general and in Sweden in particular have been, at least in initial screenings, approached by the Herfindahl–Hirsch- man Index (HHI). This article uses an alternative measure to HHI, which is based on market shares of the two largest firms in the market. The results shows that only the Swedish wholesale market has a firm that can be regarded as dominant, but only during very short periods. The results from a hypothetical merger between the second and third largest company in the Swedish wholesale market shows that when the dominant position of the largest firm is reduced, by increasing the size of the second largest firm, the threshold value indicates that competition actually will increase (contradicting to the HHI).

Place, publisher, year, edition, pages
Elsevier, 2009
Keywords
Market Dominance, Electricity Market, Herfindahl-Hirschman Index
National Category
Economics
Identifiers
urn:nbn:se:hkr:diva-9222 (URN)10.1016/j.enpol.2009.04.014 (DOI)
Available from: 2012-04-12 Created: 2012-04-12 Last updated: 2017-12-07Bibliographically approved
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