and this is a problem when estimating log-linear gravity equations. This has caused many researchers to either ignore the zero trade flows or to replace the zero with a small positive number. Both of these actions bias the resulting parameter estimates of the gravity equation. In this study we...

The Canadian Farm Products Agencies Act (2012) requires that comparative advantage be used to guide the allocation of new quota under supply management. This requirement, however, has not been met in practice. Agricultural economists have proposed several ways of making this legal requirement...

The initially stated objective of the Canadian dairy supply management–farm revenue risk reduction–has been met well by the program. However, it is less clear whether the program has served all farms equally well. Namely, it is not known how successful the program was in enhancing the...

When analyzing bilateral trade flow data, zero trade flows are quite common and problematic when a gravity equation is estimated with a log-linear functional form. This has caused many researchers to either ignore the zero trade flows or to replace zero with a small positive number. Both of...