City-level policies often aim at attracting skilled workers by improving urban amenities. However, due to endogeneity problems, studies relying on revealed preferences have difficulties in providing evidence for the basic premise that skilled workers place a higher value on urban amenities than...

High nonresponse rates have become a rule in survey sampling. In panel surveys there occur additional sample losses due to panel attrition, which are thought to worsen the bias resulting from initial nonresponse. However, under certain conditions an initial wave nonresponse bias may vanish in...