presents estimates of the effect of patent protection on the depreciation rate. Results suggest that the yearly depreciation …This paper presents estimates of the R&D depreciation rate using survey data on Australian inventions. Its novelty is … rate varies in a range of 1 to 5 per cent, although the depreciation rate is stronger in the first two years of inventions …

estimation of the value of patent rights based on European patent renewal data; and describes the use of patent data to estimate …This paper summarizes a number of studies which use patent data to examine different aspects of technological change … the importance of R&D spillovers. It concludes that patent data represent a valuable resource for the analysis of …

While policymakers often assume venture capital has a profound impact on innovation, that premise has not been … address concerns that these results are an artifact of our use of patent counts by demonstrating similar patterns when other … measures of innovation are used in a sample of 530 venture-backed and non-venture-backed firms …

, droughts and flooding on the innovation of their respective mitigation technologies. Using patent and disaster data, our study … is the first to relate natural disasters to technology innovation, and also presents the first attempt to empirically …

Scientific knowledge is believed to be the wellspring of innovation. Historically, firms have also invested in research … to fuel innovation and growth. In this paper, we document a shift away from scientific research by large corporations … innovation. Large firms appear to value the golden eggs of science (as reflected in patents) but not the golden goose itself (the …

We develop a forward‐looking profit model to estimate the depreciation rates of business R&D capital. By using data …‐specific R&D depreciation rates. The results comprise a set of R&D depreciation rates for major U.S. high-tech industries. They … percent and vary across industries. The relative ranking of the constant R&D depreciation rates among industries is consistent …

A low-quality patent system threatens to slow the pace of technological progress. Concerns about low patent quality are … supported by estimates from litigation studies suggesting that the majority of patents granted by the U.S. patent office should … not have been issued. This paper proposes a new Bayesian method for measuring patent quality, based on twin patent …

smaller cities. We analyze the idea inputs of nearly every US patent granted during 1836–2010. We find that a larger city size …

Measuring the private returns to Ramp;D requires knowledge of its private depreciation or obsolescence rate, which is … depreciation rate to construct Ramp;D capital stocks and measure the returns to Ramp;D, a rate usually equal to 15 per cent. In … estimates of returns can be inverted to derive an implied depreciation rate for Ramp;D capital. I then test these ideas on a …