MSA_OLS.m calculates the OLS model results for the Freddie Mac housing 
price index;

MSA_IV.m calculates the IV model results for the Freddie Mac housing 
price index;

MSA_IV2.m calculates the IV2 model results for the Freddie Mac housing 
price index;

Spatial_IRFs_MSA.m calculates the impulse response results for the 
Freddie Mac housing price index.
