Because of the transaction costs, while engaging in economic activities people are faced with two alternatives: underground economy or overground economy.
由于交易成本的存在，使人们在进行经济活动时，面临着地上经济还是地下经济的选择。
Because of the transaction costs, while engaging in economic activities people are faced with two alternatives: underground economy or overground economy.
由于交易成本的存在，使人们在进行经济活动时，面临着地上经济还是地下经济的选择。
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