Klier and Linn, âNew-vehicle Characteristics and the Cost of the Corporate Average Fuel Economy Standard.â Mark R. Jacobsen, âEvaluating U.S. Fuel Economy Standards in a Model with Producer and Household Heterogeneity,â American Economic Journal: Economic Policy, Vol. 5, No. 2 (May 2013), pp. 1489â87. Ibid., Table 8.
The placebo effect can make some treatments seem like they help certain symptoms, when in fact they do nothing to directly cause a change in the disease. Other factors that are sometimes lumped in with the placebo effect can also make a treatment appear to help even when it does nothing for the illness.n the past, some researchers have questioned whether thereâs convincing proof that the placebo effect is a real effect. But there are studies showing that the placebo effect is real in some situations. For example, scientists have recorded brain activity in response to placebo.
Placebo: A sugar pill or any dummy medication or treatment. For example, in a controlled clinical trial, one group may be given a real medication while another group is given a placebo that looks just like it in order to learn if the differences observed are due to the medication or to the power of suggestion. Placebos are widely used in drug trials. Search MedTerms: