Published in <A href="http://onlinelibrary.wiley.com/doi/10.1111/j.1467-9442.2010.01613.x/abstract">The Scandinavian Journal of Economics"</A>, 112(3), 618-39.<P>The perpetual inventory method used for the construction of education data per country leads to systematic measurement error. This paper analyses the effect of this measurement error on GDP regressions. There is a systematic...</p></a>

The perpetual inventory method used for the construction of education data per country leads to systematic measurement error. This paper analyses the effect of this measurement error on GDP regressions. There is a systematic difference in the education level between census data and observations...

See the article in <I>Computers Environment and Urban Systems</I> (2013). Volume 38, pages 67-77.<P> This paper aims to provide a new methodological and empirical contribution to the rising literature on the relative performance and benchmarking of large cities in a competitive world. On the basis of a...</p></i>

College education is not only an investment; for many people it also generates consumption benefits. If these benefits are normal goods, then the rich attend college at higher rates than the poor. Furthermore, the marginal poor student is smarter than the marginal rich student. Colleges aiming...

Previous research shows that ethnic minority students perform poorer in school when they are taught by ethnic majority teachers. Why this is the case was unclear. This paper focuses on one important potential explanation: I examine whether ethnic majority teachers grade minority and majority...

This discussion paper resulted in a publication in <A HREF="http://www.dovepress.com/condom-use-risk-perception-and-hiv-knowledge-a-comparison-across-sexes-peer-reviewed-article-HIV">'HIV/AIDS - Research and Palliative Care'</A>, 2013, 5, 283-293.<P> We analyze how HIV-knowledge influences condom use across the sexes. The empirical work is based on a household survey conducted among 1,979 households of a representative group of...</p></a>

In this paper we employ techniques developed in spatial econometrics to analyse spatial patterns of technology diffusion, to detect clusters and to estimate theoretical models that incorporate space explicitly. These techniques correct for misspecifications resulting from the omission of spatial...

This paper employs a unique set of micro-data covering almost one third of the Dutch labor force, to estimate the relationship between agglomeration externalities and the level of education. While the positive relationship between economic density and productivity and wages has long been...

The article is forthcoming in <A href="http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VFD-4PNM471-3&_user=499884&_coverDate=09%2F15%2F2007&_alid=770199288&_rdoc=1&_fmt=high&_orig=search&_cdi=6008&_sort=d&_docanchor=&view=c&_ct=1&_acct=C000024499&_version=1&_urlVersion=0&_userid=499884&md5=8492c97b78d795d5deec06a94b66422d">Labour Economics</A>.<p><P>

In this paper we employ techniques developed in spatial econometrics to analyse spatial patterns of technology diffusion, to detect clusters and to estimate theoretical models that incorporate space explicitly. These techniques correct for misspecifications resulting from the omission of spatial...