CBO makes its estimates of potential output on the basis of data on capital, labor, productivity, and actual GDP; statistical and other modeling methods for assessing cyclical influences and long-term trends in the economy; and analyses of the economic effects of federal tax and spending policies.
The hydrologic cycle is driven primarily by I solar energy II mechanical energy from ECOLOGY 1 at Indiana State University
Aside from glaciation and tectonics the water cycle or hydrologic cycle (see graphic below) is the driving force behind WED (weathering, erosion, and deposition). This process along with winds help form the surface landscape.