Directory UMM :Data Elmu:jurnal:E:Economics Letters:Vol68.Issue3.Sep2000:

Economics Letters 68 (2000) 339

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Corrigendum

Corrigendum to ‘‘On the calculation of marginal effects in the

q

bivariate probit model’’ [Econ. Lett. 54, (1997) 203-208]

a ,q b c

L.N. Christofides

, J.W. Hardin , T. Stengos

a

University of Guelph, Guelph, ON. N1G 2 W1, Canada

b

Stata Corporation, 702 University Dr. E., College Station, TX 77840, USA

c

University of Guelph, Guelph, ON. N1G 2 W1, Canada

Received 7 December 1998; accepted 3 February 2000

The author regrets that the above paper, contained errors in the calculations of the marginal effects. Using the notation of the paper the following expressions should replace Eqs. (1) and (2) in the paper:

≠F_{W 1,L 1}

Consequently, the marginal effect for F_{W 1} is given by

≠F ≠F

The latter expression reduces to f_{W 1}b_Wk only when r50.

These changes affect the description of component effects in Table 2. They should read (row

ˆ

*Corresponding author. Tel.: 11-519-824-4120; fax: 11-519-763-8467.

E-mail address: louisc@css.uoguelph.ca (L.N. Christofides)