Transportation plays a central role in facilitating economic activities across sectors and between regions and is essential to business-cycle research. With four coincident indicators that represent different aspects of the transportation sector—an index of transportation output, payroll, personal consumption, and employment—the classical business-cycle and growth-cycle chronologies are defined for this sector. It is found that, relative to the economy, business cycles in the transportation sector have an average lead of nearly 6 months at peaks and an average lag of 2 months at troughs. Similar to its business cycles, growth slowdowns in the transportation sector also last longer than the economywide slowdowns by a few months. This study underscores the importance of transportation indicators in monitoring cyclical movements in the aggregate economy.
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