I derive the polar representation of Fieller's estimation of confidence sets for ratios and construct a polar plot of … the test statistics for all angles associated with the ratios. This procedure helps in visualizing and clarifying, but …'s method yields a confidence set covering the entire real line. …

the confidence sets of the returns to education resulting from the plug-in principle are highly sensitive to instrument …

practitioners resort to the popular Ljung-Box test indiscriminately, even though the appropriateness of such a test is questionable …. In this paper, we investigate the empirical size and power of four diagnostic tests: the Ling-Li test, Ljung-Box test …, the Box-Pierce test modified by Tse and Tsui, and the runs test, respectively. We use Monte Carlo simulation experiments …

second order asymptotic theory. Essentially the same idea is applied to develop another new specification test using second …We develop a new specification test for the IV estimators adopting a particular second order approximation of Bekker … (1994). The new specification test compares the difference of the forward (conventional) 2SLS estimator of the coefficient …

test is to compare the volume of two confidence sets - one that is robust to lack of identification and one that is not …This paper proposes a new test of the null hypothesis that a generalized method of moments model is identified. The … test can detect local or global underidentification, and underidentification in some or all directions. The idea of the …

. Consequently, tests of exogeneity may be seen as tests for an additional set of infinite moment conditions. A number of test … explores the relative practical efficacy of the various test statistics in terms of empirical size and size-adjusted power. …

theory to construct or find a suitable bases of the kernel (null space) of the matrix and to determine the limiting … distribution of the estimator of the smallest singular values. We propose a new rank test for an unobserved matrix for which a root …-N-consistent estimator is available and construct a Wald- type test statistic (generalized Wald test). The test, based on matrix perturbation …

variety of test statistics as functions of eight mutually independent random variables and two nuisance parameters. The …