This is the research written by Joshua Aizenman Yi Sun. I have some question about the function on page 9 and on table .it is nonlinear least squares regression.
First, how can i make it simple ? (put it on the linear squares regression)
second, how can i compute t ?. in this page, you see b1 +b2*t=0, but t value on table 5 have negative before it. i can understand how can they have this result ?
finally, can you show what ways to run this regression ?

This is link of this research
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