Using panel data from the China Family Panel Studies for 2010,2014 and 2016,this paper uses a two-part model,with the first part using a fixed-effects panel log
The article takes the famous American writer and mythology scholar Joseph Campbell’s“Heroic Journey”theory as a clue to make a comparative study of“Bravehea
Customer is the source of business income,a stable customer base is the guarantee of enterprise survival and development of enterprises by using Markov decision