Hi,Dear R users,
 I am studying the generalized additive model and employ the 'mgcv' packages 
 in R.For example,I want to conduct the empirical study.The dependent variable 
 is GDP and the independent variable is foreign direct investment.How can I choose 
 the best link function and the family in this situation?
  
 In addtion, could anyone know how to interpret the figures in the gam.check function?
 The first fig is Q-Q plot,but the other?
  
  
 Thanks in advance
  
 wanhai
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