
If firms that adopt shark repellents are typical of underperforming targets in
the market for corporate control, accounting and market-based performance
measures will be inferior to that of industry rivals during the pre-adoption period.
If managerial efficiency changes following shark repellent adoptions, relative
firm performance will change significantly during the postadoption period.
V. NONPARAMETRIC TESTS OF RELATIVE PERFORMANCE
When using either cash flow-based or market-based measures of firm perfor-
mance, or a variety of indicators of the firm’s financial policy, it is important to
recognize the importance of industry-related considerations. Accounting ...