）直接的交通影响（direct transport impact）：可达性的改善（accessibilityimprovements）：（2）间接影响（indirect impacts）：辅助政策的实施（complement policies）：（3）次要影响（seondary impacts）：动力和促进力（momentum and promotion）。
They also have an indirectimpact via the wealth effect, as consumers increase their spending in response to improvement in their balance-sheets (see article).
而高房价也同时通过财富效应而间接发挥作用，随着资产增加，消费者花销也会增加。
3
One is the direct effect that exercise produces chemicals in the brain that affect mood, and the other is the indirectimpact through enhanced body image and self-esteem.