An investment model of the farm firm is constructed which allows for a
djustment costs in investment and transactions costs associated with n
ew borrowing. The presence of transaction costs means that the financi
al and investment decisions of the farm are simultaneous, and hence th
at financial decisions affect investment. In contrast to the work on l
iquidity constraints, the structure of the model generates a classific
ation of firms which is observable in the data. This model is compared
with a model that assumes perfect capital markets. Both models are es
timated and tested using a balanced panel of 3650 French farms over th
e period 1989-1993. The specification based on the perfect capital mar
ket assumption is rejected. The sample selection criterion implied by
the transaction costs model allows the estimation of an empirically ac
ceptable Euler equation for investment.