A nonparametric technique is employed, data envelopment analysis, to derive estimates of technical efficiency change in Singapore manufacturing industries for 1975 to 1998 using the Malmquist index. The results show that on average, there have been improvements in technical efficiency over the...

We consider estimation of the economic model of crime exploiting instrumental variables (IV) techniques for panel data. We extend the empirical analysis of Cornwell and Trumbull (1994) and show that their instruments are very weak. We propose an alternative identification strategy based on the...