On Windows 10, the $WINDOWS.~BT folder contains your previous Windows installation. These files are used to downgrade to a previous version of Windows, or a previous build of Windows 10.
Aggregate Demand and Supply. The macroeconomic model for Aggregate Demand and Aggregate Supply differs from the microeconomic model in the fact that the AD/AS model represents all goods and not just one single good. It takes into account the price level of all goods as well as the overall aggregate output of the economy. Aggregate Demand (AD) represents the demand side of the economy. Long-run Aggregate Supply (LAS) represents the most output that an economy can sustain. Short-run Aggregate Supply (SAS) represents the supply of the economy in the short run.
For example, if aggregate supply is growing at 3% per year (equal to 1% growth in the labor force plus 2% growth in worker productivity), then the Federal Reserve would like to maintain aggregate demand growth at an equivalent rate.Figure 7-12 illustrates this point.he aggregate supply curve shows the total output by producers of all goods and services in our economy. Note that the aggregate supply curve has a relatively flat region that rapidly becomes vertical. The flat section of aggregate supply is characterized by an economy with a good deal of excess capacity or slack.