In models with potential weak identification researchers often decide whether to report a robust confidence set based on an initial assessment of model identification. Two-step procedures of this sort can generate large coverage distortions for reported confidence sets, and existing procedures for controlling these distortions are quite limited. This paper introduces a generally-applicable appr...

Assume individuals are treated if a latent variable, containing a continuous instrument, lies between two thresholds. We place no functional form restrictions on the latent errors. Here unconfoundedness does not hold and identification at infinity is not possible. Yet we still show nonparametric point identification of the average treatment effect. We provide an associated root-n consistent est...

The derivatives with fenbufen and ethacrynic acid core compounds was synthesized through a facial preparation of 1-amino-4-azidobutane. The subsequent coupling with 102 members of carboxylic acids afforded amide products. The in situ screening using colorimetric assay with 3-(4.5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide showed that fenbufen but not ethacrynic acid butyl amide membe...

The Institute of Public Health of the Osijek-Baranja County has processed the data on cancer patients that were collected from mandatory county hospitals data reports, county bureaus of statistics and the County Register of Deaths. The cancers were defined according the International Statistical Classification of Diseases and Related Health Problems, 10th Revision (ICD-10), codes of malignant n...

This research focuses on producing biodiesel through the transesterification process of Ceiba pentandra triglyceride acid using a CaO/Hydrotalcite (CaO/HTC) catalyst. study aimed to determine effect adding catalyst mass, mole ratio oil: methanol yield, and knowing FAME content yield highest impact mass kapok seed oil FFA conversion results. Kapok was transesterified for 2 hours at temperature 6...

This paper provides a few variants of a simple estimator for binary choice models with endogenous or mismeasured regressors, or with heteroskedastic errors, or with panel fixed effects. Unlike control function methods, which are generally only valid when endogenous regressors are continuous, the estimators proposed here can be used with limited, censored, continuous, or discrete endogenous regr...

Bile salts of the coelacanth, Latimeria chalumnae, Smith, have been analyzed and shown to have three bile alcohols, latimerol, 5 alpha-cyprinol, and 5 alpha-cholestane-3 beta, 7 alpha,-12 alpha,25,26-pentol, two C24 bile acids, chenodeoxycholic acid and cholic acid, one C26 bile acid, probably 3 beta, 7 alpha, 12 alpha-trihydroxy-27-nor-5 alpha-cholestan-26-oic acid, and two C27 bile acids, 3 a...

In the single-IV model, researchers commonly rely on t-ratio-based inference, even though literature has quantified its potentially severe large-sample distortions. Building Stock and Yogo (2005), we introduce tF critical value function, leading to a standard error adjustment that is smooth function of first-stage F-statistic. For one-quarter specifications in 61 AER papers, corrected errors ar...