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Referierte Aufsätze Web of Science
This paper assesses the relative efficiency of knowledge production in the OECD using a nonparametric DEA approach. In general, resources allocated to R&D are limited and therefore must be used efficiently, given the institutional and legal constraints. The efficiency scores presented are based on an intertemporal frontier estimation for the period 1995 to 2004. We analyse the impact of the regulatory ...
In:
Oxford Economic Papers
64 (2012), 1, S. 176-196
| Astrid Cullmann, Jens Schmidt-Ehmcke, Petra Zloczysti
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Referierte Aufsätze Web of Science
Efficiency measurement in public transport requires an adequate account of unobserved network characteristics that are typically modelled as factors separable from the production process. This paper proposes a panel data model that allows for non-separable firm-specific heterogeneity in an input distance function. The proposed model is applied to a sample of German and Swiss urban transit companies ...
In:
Journal of Transport Economics and Policy
46 (2012), 1, S. 51-66
| Astrid Cullmann, Mehdi Farsi, Massimo Filippini
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Referierte Aufsätze Web of Science
In this paper, we provide a comprehensive multivariate cointegration analysis of three parts of the steam coal value chain - export, transport and import prices. The analysis is based on a rich dataset of international coal prices; in particular, we combine data on steam coal prices with freight rates, covering the period December 2001 until August 2009 at weekly frequency. We then test whether the ...
In:
Energy Economics
34 (2012), 1, S. 105-116
| Aleksandar Zaklan, Astrid Cullmann, Anne Neumann, Christian von Hirschhausen
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Referierte Aufsätze Web of Science
In January 2009, the German Federal Network Agency introduced incentive regulation for the electricity distribution sector based on results obtained from econometric and nonparametric benchmarking analysis. One main problem for the regulator in assigning the relative efficiency scores is unobserved firm-specific factors such as network and technological differences. Comparing the efficiency of different ...
In:
Empirical Economics
42 (2012), 1, S. 147-169
| Astrid Cullmann
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Referierte Aufsätze Web of Science
Several German states recently introduced tuition fees for university education. We investigate whether these tuition fees influence the mobility of university applicants. Based on administrative data of applicants for medical schools in Germany, we estimate the effect of tuition fees on the probability of applying for a university in the home state. We find a small but significant reaction: The probability ...
In:
Economics of Education Review
31 (2012), 1, S. 155-167
| Nadja Dwenger, Johanna Storck, Katharina Wrohlich
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Referierte Aufsätze Web of Science
Means-tested student aid might affect enrollment in higher education. To derive the potential influence of student aid, we use a tax-benefit microsimulation model. The effect is a non-linear function of parental income, with variation as a result of bracket creeping and various reforms. Therefore, the effect of student aid on enrollment can be separated from the effects of income and other family characteristics. ...
In:
The Scandinavian Journal of Economics
114 (2012), 1, S. 124-147
| Viktor Steiner, Katharina Wrohlich
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Referierte Aufsätze Web of Science
This paper presents the application of a mechanism that provides incentives to promote transmission network expansion in the electricity system of the Ontario province. Such mechanism combines a merchant approach with a regulatory approach. It is based on the rebalancing of a two-part tariff within the framework of a wholesale electricity market with nodal pricing. The expansion of the network is carried ...
In:
Economía Mexicana
21 (2012), 1, S. 133-173
| Juan Rosellón, Juan Tregear, Eric Zenón
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Referierte Aufsätze Web of Science
In trying to capture complete within-household heterogeneity, household panel surveys typically try to interview all adult household members. Following from this, such surveys tend to suffer from partial unit nonresponse (PUNR), that is, the nonresponse of at least one member of an otherwise participating household, most likely yielding an underestimation of aggregate household income. Using data from ...
In:
Sociological Methods & Research
41 (2012), 1, S. 89-123
| Joachim R. Frick, Markus M. Grabka, Olaf Groh-Samberg
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Referierte Aufsätze Web of Science
Respondent-driven sampling is a network sampling technique typically employed for hard-to-reach populations (for example, drug users, men who have sex with men, people with HIV). Similarly to snowball sampling, initial seed respondents recruit additional respondents from their network of friends. The recruiting process repeats iteratively, thereby forming long referral chains. Unlike in snowball sampling, ...
In:
The Stata Journal
12 (2012), 1, S. 72-93
| Matthias Schonlau, Elisabeth Liebau
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Referierte Aufsätze Web of Science
By 2011 little is known about the economic rationale of public fast chargers for electric vehicles (EV). This paper aims at providing an insight into the business case of this technology in a case study for Germany. The estimated Return on Investment (ROI) of a public fast charging station constitutes the main contribution. Potential users and organization structures are investigated as well as different ...
In:
Energy Policy
43 (2012), S. 136-144
| Andreas Schröder, Thure Traber