This is a short essay on open questions in urban economic theory.

We criticize the theories used to explain the size distribution of cities. They take an empirical fact and work backward to obtain assumptions on primitives. The induced theoretical assumptions on consumer behavior, particularly about their inability to insure against the city-level productivity...

The tomahawk bifurcation is used by Fujita et al. (1999) in a model with two regions to explain the formation of a core-periphery urban pattern from an initial uniform distribution. Baldwin et al. (2003) show that the tomahawk bifurcation disappears when the two regions have an uneven population...

The dynamics of multiple time use in paid work and in household activities with housework, child rearing and DIY of married women are analyzed with a two step procedure: the estimation of the participation decision in intertemporal labor force participation strategies (entering, leaving the...

This study on market and non-market labor supply and taxes is based on a theoretical microeconomic model with multiple labor supply in the formal and informal economy. This multiple time allocation model, which explicitly takes into account taxes, transfer payments, socioeconomic characteristics...

In meiner Antrittsvorlesung versuche ich, meine Forschungs- und Lehrvorhaben in drei Themenkomplexen zu umschreiben. Der erste Themenbereich 'Statistik und Freie Berufe', zugleich Denomination meiner Professur, beschreibt nach den Charakteristika Freier Berufe Möglichkeiten und Grenzen der...

The long-term trends of urbanization suggest: not only have more cities formed, but the leading metropolises have grown larger, with a number of peripheral subcenters developing over time. Conventional models of urban growth are limited, in that commuting cost and congestion eventually result in...

Die Freien Berufe und die staatlich gebundenen Freien Berufe agieren in einem wirtschaftsund gesellschaftspolitischen Spannungsfeld, dessen Pole durch Staat und den freien Markt gekennzeichnet werden. Der vorliegende Beitrag thematisiert Privatisierung und Deregulierung für die Freien Berufe...

The modern literature on city formation and development, for example the New Economic Geography literature, has studied the agglomeration of agents in size or mass. We investigate agglomeration in sorting or by type of worker, that implies agglomeration in size when worker populations differ by...

As simple as it is, results describing the world are heavily dependent on the quality of the underlying data. One of the very crucial variables in microanalytical analyses of well-being and human resources is income. The more, when the situation of the self-employed is regarded. This paper focus...