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

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 …

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 …

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 …