Use the data in CONSUMP.XLS and statistical software to run the following regression:

where RCONPC = real consumer spending in the USA per capita REALYDPC = real disposable income per capita REALR = real interest rate on one-year Treasury Bonds (A) Do all the explanatory variables attain their expected signs?
(B) What explanatory variables might be missing from this regression?

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RCONPC, = 0 + REALYDPC, +2 REALR, + c