The international survey of adult skills, PIAAC, records large differences in numeracy and literacy skills between immigrants and non-immigrants. We examine how these differences relate to the countries' average skills and skill rankings. Immigrants are defined by country of birth or in terms of...

Register data are described, in general terms and in specific terms, focusing on informational content from an educational science perspective. Arguments are provided for why educational scientists can benefit from register data. It is concluded that register data contain lots of information...

The scope of public human resource policy is outlined. Motivation for the need of transparency in this policy is provided in terms of informational asymmetries, human capital externalities, and long planning horizons. Transparency is defined both along a time dimension – ex ante and ex post...

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In this paper a timesaving method is proposed for maximizing likelihood functions when the parameter space is subject to nonlinear constraints, expressible as second order polynomials. The suggested approach is especially attractive when dealing with systems with many parameters.

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Most econometric multi-equation models estimated are assumed to be linear in both the variables and the parameters. One reason is that, in general, methods of linear algebra cannot be applied to nonlinear systems. <p> In this paper a certain class of nonlinear models is defined, however, the...</p>