  int<lower=0,upper=1> prior_PD; # flag indicating whether to draw from the prior
  
  # intercept
  int<lower=0,upper=1> has_intercept; # 1 = yes
  
  # family (interpretation varies by .stan file)
  int<lower=1> family;
  
  # link function from location to linear predictor 
  int<lower=1> link;            # interpretation varies by .stan file
  
  # prior family: 0 = none, 1 = normal, 2 = student_t, 3 = hs, 4 = hs_plus
  int<lower=0,upper=4> prior_dist;
  int<lower=0,upper=2> prior_dist_for_intercept;
  
