This paper develops linear estimators for structural and causal parameters in nonparametric,nonseparable models using panel data. These models incorporate unobserved, time-varying, individual heterogeneity, which may be correlated with the regressors. Estimation is based on an approximation of...

Intelligent technology introduces both opportunities and challenges in the realm of employee ethics. While intelligent technology is widely believed to combat employee unethical behavior by enhancing transparency and reducing discretionary decisions, it may also inadvertently promote unethical...

The main aim of the present study was to investigate the characteristics of products from hydrothermal treatments of cellulose in an autoclave at various temperatures (200 °C–400 °C) and residence times (5 min–2 h). The gas products mainly consisted of CO2, CO, CH4, and H2 at...