The finding of negative sample selection effects in estimated wage offer equations is often viewed as being 'problematic', resulting from misspecification of the wage and selection processes. This note shows that negative sample selection effects are plausible in the context of Heckman's...

This paper shows that the findings of Chan, Christie and Schultz (Journal of Business, 68, 1995) of no intraday variation in the average bid-ask spread is not general to all competitive markets, and in particular does not apply to the London Stock Exchange during the mandatory quote period. This...

This paper briefly explains why there may be a 'tax clientele' induced bias in the observed yield curve and attempts to estimate the size of this tax clientele bias in the term structure of UK interest rates. A method is based on the econometric technique developed by Nelson and Siegel (Journal...

This paper outlines a method for controlling for compositional factors in the measurement of poverty. The method is based in shift-share analysis and direct standarization, the later technique popular in the field of demography. The method is consistent with Sen's influential axiomatic approach...