The limits of ex post implementation without transfers
研究了在集体决策中无法使用货币转移支付时，事后实施的可能性。发现当环境既非接近私人价值也非接近共同价值时，确定性事后实施不可能，信息稳健性等理想性质难以实现。
We study ex post implementation in collective decision problems where monetary transfers cannot be used. We find that deterministic ex post implementation is impossible if the underlying environment is neither almost an environment with private values nor almost one with common values. Thus, desirable properties of ex post implementation such as informational robustness become difficult to achieve when preference interdependence and preference heterogeneity are both present in the environment.