如果政府是基于国民经济福利来制定贸易政策，那么贸易福利的问题是否可以用(教材中)图9-3中的囚

如果政府是基于国民经济福利来制定贸易政策，那么贸易福利的问题是否可以用（教材中)图9-3中的囚

徒困境来表示？如果政府以这种方式来制定政策，那么什么是囚徒困境的均衡解？如果政府需要选择贸易保护策略呢？

If governments make trade policies based on national economic welfare， is the problem of trade warfare still represented by a “Prisoner's dilemma” game as in Figure 9-3？ What is the equilibrium solution to the game if governments formulate policy in this way？ Would they ever choose the strategy of protectionism？