The Two Conditions for a Valid Instrument Are

question 15

Multiple Choice

The two conditions for a valid instrument are

• A)corr(Zi,Xi)= 0 and corr(Zi,ui)≠ 0.
• B)corr(Zi,Xi)= 0 and corr(Zi,ui)= 0.
• C)corr(Zi,Xi)≠ 0 and corr(Zi,ui)= 0.
• D)corr(Zi,Xi)≠ 0 and corr(Zi,ui)≠ 0.

---

Definitions:

Reproduce

The biological process by which organisms produce offspring, ensuring the continuation of their species.

Polistes Wasps

A genus of social wasps known for their paper nests and the complex social structures within their colonies.

Social Interaction

The process by which individuals act and react in response to others in their social environment, forming the basis of social structure and relationships.

Helping Behavior

Actions taken by an individual to assist or benefit another individual without immediate benefit to oneself.