[R-sig-ME] microeconometrics problem

[Ben Bolker]

Adam A <adam.a28 at ...> writes:


> Request you to all please provide me the solution for my problem.
 
> Find the valid instruments… Variables: - the response variable
> for the structural equation, y - the jointly endogenous RHS variable
> in the structural equation, m - two control variables (x1 and x2)
> that will always appear on the RHS of the structural equation - four
> potential instrumental variables, denoted by (z1, z2, z3, z4) The
> problem of course, is that you have no idea if the potentional IVs
> are admissible. Your mission in life is to identifity those Is for
> which the exclusion restrictions are vali, and to estimate the
> casual effect of m on y in a linear regression on the form:
> y=x1alfa1+x2alfa2+mbeta+u.

  This list is not for homework.  Can you make a plausible case
that this is not homework?  Furthermore, causal inference/
instrumental variables regression is not exactly within the
scope of the list either (my opinion, I could be persuaded 
otherwise).

  Good luck.