Dokument-ID Dokumenttyp Verfasser/Autoren Herausgeber Haupttitel Abstract Auflage Verlagsort Verlag Erscheinungsjahr Seitenzahl Schriftenreihe Titel Schriftenreihe Bandzahl ISBN Quelle der Hochschulschrift Konferenzname Quelle:Titel Quelle:Jahrgang Quelle:Heftnummer Quelle:Erste Seite Quelle:Letzte Seite URN DOI Abteilungen OPUS4-1311 Arbeitspapier Sanner, Helge Price responses to market entry with and without endogenous product choice Textbook wisdom says that competition yields lower prices and higher consumer surplus than monopoly. We show in two versions of a simple location-product differentiation model with and without endogenous choice of products that these two results have to be qualified. In both models, more than half of the reasonable parameter values lead to higher prices with duopoly than with monopoly. If the product characteristics are exogenous to the firms, consumers may even be be better off with monopoly in average. 2005 urn:nbn:de:kobv:517-opus-14399 Wirtschaftswissenschaften OPUS4-1304 Arbeitspapier Sanner, Helge Instability in competition In this paper we show that Puu (2002) does not provide a stable solution to the location game, according to his own definition of stability. If the usual two-stage game is considered, where in the first stage a location is chosen once and forever, and in the second stage prices are determined, the equilibrium proves stable for a sizeable interval of parameters, however. Even though this procedure is most common in analyzing Hotelling's location problem, it is not satisfying because it exhibits an inconsistent informational structure. The search for a better concept of stability is imperative. 2005 urn:nbn:de:kobv:517-opus-14299 Wirtschaftswissenschaften OPUS4-1300 Arbeitspapier Sanner, Helge Bertrand Wettbewerb im Raum kann zu höheren Preisen führen als ein Monopol In Mikro- und Industrieökonomik ist scheinbar gewiss, dassWettbewerb zu niedrigeren Preisen führt und dass Konsumenten von Wettbewerb profitieren, während die etablierten Unternehmen einen Nachteil erleiden. Dieser Beitrag verwendet ein raumwirtschaftliches Standardmodell, um zu zeigen, dass dies nicht immer so sein muss. Der Grund ist, dass durch den Marktzutritt gerade die Konsumenten, deren Preiselastizität am größten ist, von dem Unternehmen bei der Preisbildung nicht berücksichtigt werden. 2005 urn:nbn:de:kobv:517-opus-14251 Wirtschaftswissenschaften OPUS4-1249 Arbeitspapier Sanner, Helge Bargaining structure and regional unemployment insurance This study examines how the size of trade unions relative to the la- bor force impacts on the desirability of different organizational forms of self-financing unemployment insurance (UI) for workers, firms, and with reference to an efficiency criterion. For this purpose, we respectively nu- merically compare the outcome of a model with a uniform payroll tax to a model where workers pay taxes according to their systematic risk of unemployment. Our results highlight the importance of the bargaining structure for the assessment of a particular UI scheme. Most importantly, it depends on the size of the unions whether efficiency favors a uniform or a differentiated UI scheme. 2001 urn:nbn:de:kobv:517-opus-13747 Wirtschaftswissenschaften OPUS4-1250 Arbeitspapier Sanner, Helge Regional unemployment insurance We examine the effects of regionalising the budget of unemployment insurance (UI) on wages, employment, and on UI parameters, which, for their part, determine the agents' preferences concerning such a reform. A numerical example shows that, under reasonable assumptions, the intuition that the reform would enhance efficiency and improve the economic situation of agents from the low- unemployment region to the disadvantage of agents from the high- unemployment region is not valid in general. 2001 urn:nbn:de:kobv:517-opus-13705 Wirtschaftswissenschaften OPUS4-1251 Arbeitspapier Sanner, Helge Endogenous unemployment insurance and regionalisation Our analysis is concerned with the impact of a regionalisation of unemployment insurance (UI) on workers' preferences, on firms' profits, and on effciency. The existence and the extent of UI are endogenously derived by maximising an objective function of the state. Three different types of regionalisation are considered which differ with respect to the area the UI objective function is related to, and with respect to the policy variable used to maximise it. It comes to light that workers are always in favour of central UI, while it depends on the type of regionalisation whether or not firms are better off with regional or with central UI. The same somewhat surprising result applies for efficiency. 2001 urn:nbn:de:kobv:517-opus-13761 Wirtschaftswissenschaften OPUS4-1286 Arbeitspapier Sanner, Helge Economy vs. history The aim of this study is to examine in which cases economic forces or historical singularities prevail in the determination of the long-run distribution of firms. We develop a relatively general model of heterogenous firms' location choice in discrete space. The main force towards an agglomerated structure is the reduction of transaction costs for consumers if firms are located closely, whilst competition and transport costs work towards a more disperse structure. We then assess the importance of the initial conditions by simulating and comparing the resulting distribution of firms for identical economic parameters but varying initial settings. If the equilibrium distributions of firms are similar we conclude that economic forces have prevailed, while differences in the resulting distributions indicate that 'history' is more important. The (dis)similarity of distributions of firms is calculated by means of a measure, which exhibits a number of desirable features. 2004 urn:nbn:de:kobv:517-opus-14134 Wirtschaftswissenschaften OPUS4-1269 Arbeitspapier Sanner, Helge Imperfect goods and labor markets, and the union wage gap Existing theoretical literature fails to explain the differences between the pay of workers that are covered by union agreements and others who are not. This study aims at closing this gap by a single general- equilibrium approach that integrates a dual labor market and a two- sector product market. Our results suggest that the so­ called 'union wage gap' is largely determined by the degree of centralization of the bargains, and, to a somewhat lesser extent, by the expenditure share of the unionized sector's goods. 2003 urn:nbn:de:kobv:517-opus-13949 Wirtschaftswissenschaften OPUS4-1270 Arbeitspapier Sanner, Helge Imperfect goods and labor markets, regulation, and spillover effects (De)regulatory interventions frequently have unintended cross- market effects, which may or may not be desirable. We assess the effects of three policies on aggregate variables, in particular real income, from a theoretical perspective. Our results suggest that instruments acting upon wages have only a weak impact on real income, whereas the distribution of income is affected strongly. In contrast, a policy that enhances product market competition is fostering real income, but also impacts strongly on union wages and the distribution of income. 2003 urn:nbn:de:kobv:517-opus-13951 Wirtschaftswissenschaften OPUS4-1313 Arbeitspapier Blien, Uwe; Sanner, Helge Structural change and regional employment dynamics A casual look at regional unemployment rates reveals that there are vast differences, which cannot be explained by different institutional settings. Our paper attempts to trace these differences in the labor market performance back to the regions' specialization in products that are more or less advanced in their product cycle. The model we develop shows how individual profit and utility maximization endogenously yields higher employment levels in the beginning. In later phases, however, employment decreases in the presence of process innovation. Our model suggests that the only way to escape from this vicious circle is to specialize in products that are at the beginning of their "economic life". The model is based on an interaction of demand and supply side forces. 2006 urn:nbn:de:kobv:517-opus-14425 Wirtschaftswissenschaften