Suppose a Case Management Program Is Established to Reduce Rehospitalization

question 2

Multiple Choice

Suppose a case management program is established to reduce rehospitalization rates in a hospital and that those rates drop dramatically once the new program is established. We can conclude that:​

• A) ​research has demonstrated an effective approach to practice.
• B) causality cannot be inferred because time order was not established.​
• C) another event occurring during the time of the study might explain away the change.​
• D) the absence of covariation threatens the internal validity of any causal inferences.​

---

Definitions:

Opportunity Cost

The cost of foregone alternatives when a choice is made, represented by the benefits that could have been received by choosing the next best alternative.

Soybeans

Refers to a type of legume native to East Asia, widely grown for its edible bean which has numerous uses.

Comparative Advantage

The ability of a country or individual to produce a particular good or service at a lower opportunity cost than others.

Absolute Advantage

The capability of a country, individual, company, or region to produce a good or provide a service more efficiently than its competitors when using the same amount of resources.