When collecting data to conduct research, if the sample used includes only observations which have remained in the sample over time, making that sample unrepresentative of the broader population, ________ occurs.
A. regression discontinuity
B. difference-in-differences
C. intention to treat
D. survivor bias
Answer: D
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Refer to the figure below. In response to gradually falling inflation, this economy will eventually move from its short-run equilibrium to its long-run equilibrium. Graphically, this would be seen as 
A. long-run aggregate supply shifting leftward B. Short-run aggregate supply shifting upward C. Short-run aggregate supply shifting downward D. Aggregate demand shifting leftward
What is meant by utility?
What will be an ideal response?
An improvement in technology would shift
a. the demand curve leftward b. the demand curve rightward c. the supply curve leftward d. neither the supply nor the demand curve; instead, there is movement along both of them e. the supply curve rightward
Sugar price supports ensure an abundance of sugar, and hence reasonable prices for consumers
a. True b. False Indicate whether the statement is true or false