The Decision to Patent with Vertical Product Differentiation -- An Empirical Investigation of the Decision to Patent … with Vertical Product Differentiation -- The Decision to Patent with Horizontal Product Differentiation -- An Empirical … Investigation of the Decision to Patent with Horizontal Product Differentiation -- Summary and Discussion …

improvements. Using both panel estimation and quantile regression methods on household travel diary data collected in Germany …

. Our further contribution to the literature is that next to the usual panel data models such as pooled and within models we … advantage of the panel dimension, given the short sample for which the data are available, and hence gain efficiency and …