Thanks to Stefan Schubert for his lucid and constructive line-by-line criticism of an earlier version, and to Staffan Angere for several helpful additional comments.
I thank Jason Abrevaya, V. Bhaskar, John Komlos, Steve Trejo, a referee and an editor, and participants in seminars at several institutions for helpful comments.
We also thank several anonymous reviewers for helpful comments.
M. Higgs, A. Royle, M. Farnsworth and several anonymous reviewers provided helpful comments on earlier drafts.
We would like to thank Peter Keightley and several anonymous referees for helpful comments, Cedric Feshotte, Araxi Urrutia, Laurence Hurst and King Jordan for helpful discussion and David Haussler for encouragement.
D. Bonter, M. Burger, S. Butchart, C. Elphick, T. Hodgman, A.Wells and several anonymous reviewers provided helpful comments on earlier drafts of the manuscript.
We also thank several anonymous reviewers for their helpful comments.
We thank various colleagues for helpful comments on the manuscript.
For helpful comments and criticisms, I would especially like to thank Kelly Becker, David Craven, Steven Crowell, Hubert Dreyfus, Manfred Frings, Charles Guignon, Allison Hagerman, Brent Kalar, Joachim Oberst, Tao Raspoli, Matthew Ratcliffe, Joseph Rouse, Joseph Schear, Gino Signoracci, Tina Tahir, Mungo Thomson, Mark Wrathall, and several anonymous referees.
We acknowledge helpful comments from anonymous reviewers.
