有三种心理因素较为突出：首先，在不断变化的世界经济中人们对价值源泉的认识改变；第二，公众对受到国际认可的"魅力"都市有很强的信心；第三，投机泡沫有着让人眼花缭乱的活力。
Three psychological causes stand out: first, a change in people's perceptions about the source of value in a changing world economy; second, increasing public faith in "glamour" cities with international name recognition; and third, the plain giddy dynamics of speculative bubbles.