We apply additive mixed regression models (AMM) to estimate hedonic price equations. Non-linear effects of continuous covariates as well as a smooth time trend are modeled non-parametrically through P-splines. Unobserved district-specific heterogeneity is modeled in two ways: First, by location...

The innovation system approach has become a current and frequently used tool for the assessment of innovative activities in different fields of study. So far, however, there is no unanimous agreement on the issue of the most relevant perspective which has to be taken when applying the approach...