In the literature technical change is mostly assumed to be exogenous and specified as afunction of time. However, some exogenous external factors other than time can also affecttechnical change. In this paper we model technical change via time trend (purely externalnon-economic) as well as other...

The main objective of this study is to investigate the impact of corporate R&D activities onfirms’ performance, measured by labour productivity. To this end, the stochastic frontiertechnique is applied, basing the analysis on a unique unbalanced longitudinal datasetconsisting of 532 top...