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Here's a letter to the New York Times:

Bob Herbert is impressed with a new Rockefeller Foundation study by Yale's Jacob Hacker and others that finds that Americans have become increasingly economically insecure over the past quarter century ("Long-Term Economic Pain," July 27).  I read the study and, for several reasons, cannot accept the authors' (and Mr. Herbert's) conclusion that this measured insecurity reflects a failure of public policy.

For example, among the critical findings – as...