This article examines learning-by-doing that is specific not just to individual firms but to pairs of firms working together in a contracting relationship. Using data from the oil and gas industry, I find that the productivity of an oil production company and its drilling contractor increases with their joint experience. This learning is relationship-specific: drilling rigs cannot fully appropr...

We review the econometric literature on measuring the returns to R&D. The theoretical frameworks that have been used are outlined, followed by an extensive discussion of measurement and econometric issues that arise when estimating the models. We then provide a series of tables summarizing the major results that have been obtained and conclude with a presentation of R&D spillover returns measur...

We propose a Laplace stochastic frontier model as an alternative to the traditional model with normal errors. An interesting feature of the Laplace model is that the distribution of inefficiency conditional on the composed error is constant for positive values of the composed error, but varies for negative values. Therefore, it may be ideally suited for analyzing industries with many forms on o...

East German manufacturers’ revenue productivity is substantially below West levels, even three decades after unification. Using firm-product-level data with product quantities and prices, we analyze the role of specialization show that prominent “extended work bench hypothesis” cannot explain these sustained differences. Eastern firms specialize in simpler varieties generating less consumer val...

This paper quantifies the contribution of technology gaps to international income inequality. I develop an endogenous growth model where cross-country differences in R&D efficiency and cross-industry innovation adoption opportunities together determine equilibrium gaps, trade patterns, Countries with higher are richer have comparative advantage more innovation-dependent industries. calibrat...

Androgen control of penis development/growth is unclear. In rats, androgen action in a foetal 'masculinisation programming window' (MPW; e15.5-e18.5)' predetermines penile length and hypospadias occurrence. This has implications for humans (e.g. micropenis). Our studies aimed to establish in rats when androgen action/administration affects development/growth of the penis and if deficits in MPW ...

The purpose of this study is to measure and compare the efficiencies for 35 manufacturing firms listed in Amman Stock exchange (ASE) Jordan over period 2009-2017. A panel data was collected nine years, from annual reports firms. Data Envelopment Analysis (DEA) used an average efficiency score each firm, DEA also find a scores, since available short years bootstrap technique estimate confidence ...

When firms collude and charge supracompetitive prices, consumers can bring antitrust lawsuits against the firms. litigation cost is low, accept as just another of doing business, whereas when high, lower price to deter litigation. Class action modeled a mechanism that allows plaintiffs attorneys obtain economies scale. We show class actions, firms’ incentive block them, may or not be socially d...

Firm-level, revenue-based productivity measures are ubiquitous in studies of firm dynamics and aggregate outcomes. One common measure is increasingly interpreted as reflecting “distortions” since distortions’ absence, equalization marginal revenue products should yield no dispersion this measure. Another but distinct the residual firm-level function, which reflects “fundamentals.” Using micro-l...