In the Model $Y _ { i } = \beta _ { 0 } + \beta _ { 1 } X _ { 1 } + \beta _ { 2 } X _ { 2 } + \beta _ { 3 } \left( X _ { 1 } \times X _ { 2 } \right) + u _ { i }$

question 27

Multiple Choice

In the model $Y _ { i } = \beta _ { 0 } + \beta _ { 1 } X _ { 1 } + \beta _ { 2 } X _ { 2 } + \beta _ { 3 } \left( X _ { 1 } \times X _ { 2 } \right) + u _ { i }$ the expected effect $\frac { \Delta Y } { \Delta X _ { 1 } }$ is

• A) \(\beta _ { 1 } + \beta _ { 3 } X _ { 2 }\)
• B) \(\beta _ { 1 } .\)
• C) \(\beta _ { 1 } + \beta _ { 3 }\)
• D) \(\beta _ { 1 } + \beta _ { 3 } X _ { 1 }\)

---

Definitions:

President McKinley

The 25th President of the United States, William McKinley, served from 1897 until his assassination in 1901, and was known for leading the nation during the Spanish-American War.

Logistics

The detailed coordination and implementation of complex operations, often relating to the transportation and storage of goods.

Spanish Military Power

Refers to the strength and capabilities of Spain's armed forces historically and in contemporary times.

Hawaii Annexation

The process by which Hawaii became a part of the United States in 1898, marking the expansion of U.S. territory in the Pacific.