This paper examines the relationship between various types of corn research and development (R&D) and corn prices in the United States through a fixed effects panel data model. This research explores R&D investment from both nonprofit and for-profit institutions and the effect these have corn prices. In addition, we look at the effect that corresponding exogenous changes in corn prices have on ...

We construct a measure of gubernatorial candidates’ personal appeal by showing 10-second, silent video clips of unfamiliar gubernatorial debates to a group of experimental participants and asking them to predict the election outcomes. The participants’ predictions explain more than 20 percent of the variation in the actual two-party vote share across the 58 elections in our study, and their imp...

For analyses of longitudinal repeated-measures data, statistical methods include the random effects model, fixed effects model and the method of generalized estimating equations. We examine the assumptions that underlie these approaches to assessing covariate effects on the mean of a continuous, dichotomous or count outcome. Access to statistical software to implement these models has led to wi...

This paper examines whether and how the entry of foreign multinational firms affects productivity growth of domestically owned firms, using Japanese firm-level data for the period 2000-2007. Although there are a considerable number of studies conducting productivity analyses on foreign multinationals and domestic firms for the manufacturing sector, there are few such studies for the service sec...

variace / covariance components of 227118 first lactaiom test-day milk yield records belonged to 31258 iranian holstein cows were estimated using nine random regression models. afterwards, different measures of persistency based on estimation breeding value were evaluated. three functions were used to adjust fixed lactation curve: ali and schaeffer (as), quadratic (le3) and cubic (le4) order of...

In the current paper, using a sample data of 58 firms consisting of automakers and auto component suppliers across a 14-year period, we study the factors contributing to efficient inventory management in the Indian automotive Industry. We use fixed effects regression models to document trends in inventory holdings over time and how this varies across inventory types and across tiers in the supp...