Omitted Variable Bias

question 2

Multiple Choice

Omitted variable bias

• A)will always be present as long as the regression R² < 1.
• B)is always there but is negligible in almost all economic examples.
• C)exists if the omitted variable is correlated with the included regressor but is not a determinant of the dependent variable.
• D)exists if the omitted variable is correlated with the included regressor and is a determinant of the dependent variable.

---

Definitions:

Spirogyra

A genus of filamentous green algae known for its spiral chloroplasts and its role in freshwater ecosystems.

Agar

Agar is a gelatinous substance derived from red algae that is used as a growth medium in microbiological work, as well as a thickener in food products.

Red Algae

Marine photosynthetic protists with a notable abundance of phycobilin pigments; includes coralline algae of coral reefs.

Protozoans

Diverse group of unicellular eukaryotic organisms, often considered as "animal-like" protists, that inhabit water or soil.