We model the teacher-student relationship as an agency problem, where teachers are concerned with human capital formation and students --- ability signaling. The model's distinctive feature is that with grading rules unobservable for the job market the teacher finds grades costless incentives....

COVID-19 has profoundly changed the way that we study and work. For students, especially primary and middle school students, online education has become a solution to learning problems. However, online and offline education have their own characteristics and different learning efficiencies in...

This paper examines how to design the sustainable production line in the factories with minimum environmental impacts and maximum social benefits. For modeling, the literature review is carried out first and according to researches and papers, environmental and social factors are extracted and...