Damage Control and Increasing Returns: Further Results
通过分析损害与控制函数的数学结构，给出了局部递增回报的充要条件，并提供了单一或多重控制输入的示例应用，以及检验凹性违反的简单实证方法。
Abstract Recently, researchers have been paying attention to the possibility of increasing returns to the use of damage control inputs under very plausible technologies. By looking at the mathematical structure of damage and control functions, we can describe a necessary and sufficient condition on these functions for locally increasing returns to occur. Using examples, I demonstrate how the result can be applied to models with single or multiple control inputs. Because analytic solutions are sometimes not possible, a simple empirical test for concavity violations is also provided. A caution is given about problems associated with estimating the basic model specification.