This volume of proceedings, available both as hard copy and pdf <http://www.iamo.de/dok/sr_vol25.pdf>, is an edited compilation of selected contributions to the IAMO Forum 2004, which will be held in Halle (Saale), Germany, at the Institute of Agricultural Development in Central and Eastern Europe from 4 to 6 November 2004....</http://www.iamo.de/dok/sr_vol25.pdf>

We compute aggregate productivity of three categories of regions, classified by level of urbanization in the Netherlands, from firm-specific total factor productivity (TFP) measures. TFP measures are estimated by a semi-parametric algorithm, within 2-digit industries, covering agriculture,...