平均消费倾向（Average propensity to consume，简称APC）又称消费倾向，是指任一收入水平上消费支出在收入中的比率，如用公式表示则是：APC=C/Y
但结论(3)和平均消费倾向并无太大关系。
But statement (3) does not concern the average propensity to consume.
换言之，不确定性降低了平均消费倾向，但提高了边际消费倾向。
In other words, uncertainty lowers the APC but raises the MPC.
进一步的分析表明居民平均消费倾向下降是居民消费率下降的主因。
Further analysis shows that the declining tendency of residents average consumption is the main cause for decline of domestic consumption.
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