This paper shows the impact that investment in infrastructure may have on the efficiency of agricultural products markets. Using daily price series for the most important agricultural crop in Peru (potato), in 10 cities from 1995 to 2001, we show that there is enough evidence to conclude that...

Essentially all empirical questions that are addressed with sample data require estimates of sampling variance. The econometrics and statistics literatures show that these estimates depend critically on the design of the sample. The sample for the U.S. Current Population Survey (CPS), which...

In recent years, the American market system has come under increasing criticism from those it serves. Many young people, radicals, members of minority groups and even middle-of-the-roaders are concerned about such things as poor product quality, poor variety, unsafe products. and misleading...