Recent developments in investment research have highlighted the importance of non-convexities and irreversibilities in the firms' adjustment of quasi-fixed inputs. However, aggregation across capital goods may smooth out the discontinuities associated with the adjustment of individual assets....

This study was prepared by Nadine Fabritz while she was working at the Ifo Institute for Economic Research in the Department for Human Capital and Innovation. It was completed in June 2014 and accepted as a doctoral thesis by the Department of Economics at the University of Munich in October...