Public procurement of infrastructure has been subject to a long standing debate concerning the procurements' qualification requirements. Basically, it remains unclear what determines public procurement officers to vary procurements' qualification requirements. This research serves to elaborate...

This discussion paper resulted in a publication in the <A href="http://onlinelibrary.wiley.com/doi/10.1111/j.1467-9787.2006.00448.x/abstract">'Journal of Regional Science'</A>, 2006, 46(3), 493-506.<P> Fringe benefits of various kinds have become an essential element of modern labour market mechanisms. Firms offer transport-related fringe benefits such as transport subsidies (company...</p></a>

The presence of investment cycles demonstrates the long-run policy of firms investing in particular periods (investment spikes) with lower or zero investment levels in between, which contradicts the smooth pattern predicted by a convex adjustment model. This paper investigates the spells between...