We explain when and how staggered difference-in-differences regression estimators, commonly applied to assess the impact of policy changes, are biased. These biases are likely to be relevant for a large portion of research settings in finance, accounting, and law that rely on staggered treatment ...
Overall, there was a significant difference in the level of income between both genders (χ2 = 9.491, p-value = 0.050). This shows that female respondents earn less than male respondents. Overall, the socioeconomic status of male and female respondents was different in terms of age, ...
In addition, three groups of Dianhong tea infusions were well distinguished by using orthogonal partial least squares regression analysis (R2Y =0.985, #2=0.902). In addition, based on VIP>1.2 and significance P<0.05, a total of 7 key differential components ...
Relative Risk and Odds Ratios are often confused despite being unique concepts. Why? Well, both measure association between a binary outcome variable and a continuous or binary predictor variable. And unfortunately, some people use the names interchangeably. They shouldn’t be because they have diffe...
Methods Design of the citizen science project. For the citizen science project, we chose high school students between 14 and 16 years of age because these students already have a basic knowledge in natural sciences and soon have to decide if they would like to continue studying this ...
Answer to: Explain the difference between the damping coefficient and damping ratio. Which should be used in engineering practice? Explain. By...
Random-effects GLS regression Number of obs = 28,494 Group variable: idcode Number of groups = 4,710 R-squared: Obs per group: Within = 0.1373 min = 1 Between = 0.2552 avg = 6.0 Overall = 0.1797 max = 15 Wald chi2(3) = 5100.33 ...
balances between boreal and arctic lakes E. J. Lundin1,6, J. Klaminder2, D. Bastviken3, C. Olid2, S. V. Hansson4,5 & J. Karlsson6 Lakes play an important role in the global carbon (C) cycle by burying C in sediments and emitting CO2 and CH4 to the ...
Alsoλrsh=μrshμ20hr/2μ02hs/2, whereμrsh=∑i=1Nh(Yhi−Yh¯)r(Xhi−Xh¯)sNh−1. Here, λ40h=β2(yh) and λ04h=β2(xh). 3. Existing estimators This section introduces the existing estimators of finite population variances. In stratified random sampling, the variance of ...
Answer to: Explain how to tell the difference between full model and reduced model in terms of ANOVA tables. By signing up, you'll get thousands of...