R2 and adjusted R2 may exaggerate a model's true ability to predict the dependent variable in the presence of overfitting, whereas leave-one-out R2 (LOOR2) is robust to overfitting. We demonstrate this by replicating 279 regressions from 100 papers in top economics journals, where the median...

Synthetic Control Method (SCM) is a popular approach for causal inference in panel data, where the optimal weights for control units are often sparse. But the sparsity of SCM has received little attention in the literature except Abadie (2021), which explores the sparsity from the perspective of...

The ag-biotech industry underwent considerable consolidation in the last decade in part to take advantage of economics of scale and scope. The paper investigates the impact of such consolidation on inventive activity at the firm level. Careful attention is paid to the role of firm size,...

Polluted stormwater (PSW) treatment is increasingly urgent with the existence of multiple pollutants from non-point-pollution sites. In this work, alfalfa biochar (AF) loaded with Mg/Fe layered double hydroxide (Mg/Fe-LDH) was successfully synthesized to remove trace metal(loid)s from...

The development of functionalized polymer-based filament enables the fused deposition modeling (FDM) 3D-printed materials or structures with a wide range of unique functions. This work explores the use of MAPbX 3 (MA = CH 3 NH 3 , X = Cl, Br, I or mixture of them) perovskite quantum dots (PQDs)...

Traffic emission problems and emerging electric vehicle technologies attract researchers’ attention. In order to manage traffic emissions and efficiency associated with different power source vehicles, this study investigates the optimal design of charging stations and low emission zone (LEZ)...

Synthetic Control Method (SCM) is a popular approach for causal inference in panel data, where the optimal weights for control units are often sparse. But the sparsity of SCM has received little attention in the literature except Abadie (2021), which explores the sparsity from the perspective of...