If it is an investment then we need to look at ROI and determine the point at which this investment becomes cash flow positive from a net tax expenditure standpoint. Chinese, Korean, Indian, Russian, Persian immigrants are throwing off cash in generation 1 -- wait and see is not required. But 2nd and 3rd generation Hispanic immigrants have not achieved significantly greater economic success than the 1st generation.

If it is an investment then we do need to look at these bottom line metrics.