❛清心直說❜: diminishing marginal return

星期四, 5月 05, 2005

diminishing marginal return

4:46am, 3969 words
6:13am, 4443 words

2 則留言:

DoA 說...: Oh, finally I met an economist in the bloggers' world.; 12:16 下午
sheungyee 說...: no way !! haha; 3:34 上午

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