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A matrix representing the model space built using subset of regressors from the economic_growth dataset. The included regressors are ish, sed, pgrw and pop. Therefore the model space contains 2^4 = 16 models (columns).
economic_growth
ish
sed
pgrw
pop
2^4 = 16
economic_growth_ms
A double matrix with 51 rows and 16 columns.