Standard courses in economics talk about the law of demand and supply, where prices are determined to equate the two. Joseph Stiglitz: The 99 Percent Wakes Up Joseph E. Stiglitz May 1, 2012. Those ships he speaks of equate to jobs at shipyards, the planes to jobs at Boeing/Lockeed/etc.
An exercise stress test is designed to find out if one or more of the coronary arteries feeding the heart contain fatty deposits (plaques) that block a blood vessel 70% or more. Additional testing is often required to confirm the test result. Test result.
The exercise stress test is a useful screening tool for the detection of significant coronary artery disease. Documentation of the patient's symptoms, medications, past and current significant illnesses, and usual level of physical activity helps the physician determine if an exercise stress test is appropriate.