This article compares the predictions of finite shareholder models of
conditional and unconditional takeover offers with the outcomes of lab
oratory experiments. In addition to differentiating between types of o
ffers, the experimental designs span small and large firms as well as
different levels of offer premiums. It is found that in unconditional
offers to large groups of subjects (28-40), the symmetric Nash equilib
rium predicts observed tendering frequencies quite accurately. For oth
er experimental designs, the results are mixed The analysis of shareho
lder tendering strategies from the experiment yields insights into (i)
the effects of takeover offer designs, (ii) the appropriateness of fi
nite-shareholder models for research and (iii) the costs of free ridin
g when shareholders are nonatomistic.