"Most intervention studies have been silent on the assumed structure of the economic system--implicitly imposing implausible assumptions--despite the fact that inference depends crucially on such issues. This paper proposes to identify the cross-effects of intervention with the level and...

"This paper examines the technical efficiency of U.S. Federal reserve check processing offices over 1980-2003. We use new unconditional quantile estimator of efficiency that avoids some drawbacks of other recently proposed estimators. The new estimator is fully non-parametric, robust with...