Firm Foundations and the Role of Financing Constraints

Improving the economic conditions for small and medium sized firms as well as start-ups is high on the agenda of policy makers. In this paper we discuss some policy options for fostering the creation of new enterprises. The discussion focuses on measures which aim at helping start-ups to overcome liquidity constraints. In order to provide the background for this discussion the paper provides some new empirical results on the determinants of firm foundations as well as some stylised facts on the occurence of liquidity constraints in West-Germany. We analyse the regional distribution of start-up intensity and offer several hypotheses to explain this distribution. To a large extent, the regional distribution of start-ups can be explained by the existing industry structure, regional human capital as well as the regional public traffic infrastructure. Moreover, we show that liquidity constraints occur more often in small and young firms.     

Analysis of an integrated maximum covering and patrol routing problem

In this paper, we address the problem of determining the patrol routes of state troopers for maximum coverage of highway spots with high frequencies of crashes (hot spots). We develop a specific mixed integer linear programming model for this problem under time feasibility and budget limitation. We solve this model using local and tabu-search based heuristics. Via extensive computational experiments using randomly generated data, we test the validity of our solution approaches. Furthermore, using real data from the state of Alabama, we provide recommendations for (i) critical levels of coverage; (ii) factors influencing the service measures; and (iii) dynamic changes in routes.