Is there an inverted-U curve between income level and FDI's effect on economic growth?

[manaminomura]

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[sangdonlee]

Hi Manami,

Just out of curiosity, I am suspecting that the key equation may suffer multicollinearity because you included 3 related terms: log(GNI), FDI*log(GNI) and log(GNI)^2.

Regards,

Sangdon Lee