例句與造句

1. His recent econometrics papers include estimation of difference in difference models, semi-parametric duration models, weak instruments, and errors in variables in non-standard situations.
2. His research has contributed to advances in a variety of topics, including treatment effect models, instrumental variable estimation, matching estimators, difference in differences, and synthetic controls.
3. While the methodology ( see difference in differences ) and its claim has been disputed by some ( see minimum wage for discussion ), many economists, including Joseph Stiglitz and Paul Krugman, accept Card and Krueger's findings.
4. Using the econometric difference in differences technique, Nagaraj compared the different effects of digitization for ( 1 ) players who began their professional baseball career after 1964 and as a result had no new digitized public-domain material and ( 2 ) players who had played before and were thus more likely to have digitized material about them enter the public domain.
5. In contrast to a time-series estimate of the treatment effect on subjects ( which analyzes differences over time ) or a cross-section estimate of the treatment effect ( which measures the difference between treatment and control groups ), difference in differences uses panel data to measure the differences, between the treatment and control group, of the changes in the outcome variable that occur over time.
6. It's difficult to find difference in difference in a sentence. 用difference in difference造句挺難的