What Is the Null Hypothesis for a Hausman Test for Endogeneity

question 16

Multiple Choice

What is the null hypothesis for a Hausman test for endogeneity?

• A)cov (z,x)> 0
• B)cov(x,e)> 0
• C)cov(x,e)= 0
• D)e is normally distributed

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Definitions:

Intestinal Phase

A phase of gastric secretion that begins when food enters the small intestine, triggering hormones that influence digestive processes.

Duodenal Gland

Small gland that opens into the base of intestinal glands; secretes a mucoid alkaline substance.

Duodenal Mucosa

The lining of the duodenum, which contains cells responsible for the secretion of enzymes necessary for digestion.

Acidic Chyme

The partially digested, acidic food that passes from the stomach to the small intestine.