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.
A placebo may genuinely improve symptoms and even affect physiology. The power of the placebo effect is significant enough that it can actually skew study results.