| 模型 | 模型答案 | 正确答案 |
|---|---|---|
| 金声玉亮2.0 | A. An increase in the marginal propensity to consume Explanation: The spending multiplier is the ratio of the change in real GDP to the change in autonomous spending. An increase in the marginal propensity to consume (MPC) means that households are more likely to spend their income, which increases the multiplier effect. This is because a higher MPC means that more of the initial increase in spending will be spent again, leading to a larger increase in real GDP. The other options are incorrect because: * B. A decreased velocity of money would actually decrease the spending multiplier, as it would reduce the rate at which money is spent and respent in the economy. * C. An increase in the marginal propensity to save (MPS) would decrease the spending multiplier, as it would mean that households are more likely to save their income rather than spend it. * D. An increase in the real interest rate would decrease the spending multiplier, as it would make borrowing more expensive and reduce consumption and investment. |
A |
| deepseekr1 | A. An increase in the marginal propensity to consume (MPC) directly raises the spending multiplier, as the multiplier formula \( \frac{1}{1 - \text{MPC}} \) grows larger when MPC increases. Conversely, a higher marginal propensity to save (MPS) (Option C) reduces the multiplier. The velocity of money (Option B) and real interest rates (Option D) influence total spending but not the multiplier itself. Answer: A |
A |
| gpto1 | A | A |
| GPT-4o | A. An increase in the marginal propensity to consume | A |
| llama3.1-70B-Instruct | A |
A |
| llama3.1-405B-Instruct | A. An increase in the marginal propensity to consume Explanation: The spending multiplier is the ratio of the change in real GDP to the change in autonomous spending. An increase in the marginal propensity to consume (MPC) means that households are more likely to spend their income, which increases the multiplier effect. This is because a higher MPC means that more of the initial increase in spending will be spent again, leading to a larger increase in real GDP. The other options are incorrect because: * B. A decreased velocity of money would actually decrease the spending multiplier, as it would reduce the rate at which money is spent and respent in the economy. * C. An increase in the marginal propensity to save (MPS) would decrease the spending multiplier, as it would mean that households are more likely to save their income rather than spend it. * D. An increase in the real interest rate would decrease the spending multiplier, as it would make borrowing more expensive and reduce consumption and investment. |
A |
| DeepSeek-Coder-V2 | A | A |
| Qwen2-72B-Instruct | A. An increase in the marginal propensity to consume | A |
| baichuan4 | A | A |
| doubao | A The spending multiplier is directly related to the marginal propensity to consume. A higher marginal propensity to consume means more of each additional dollar of income is spent, which leads to a larger multiplier. An increase in the marginal propensity to consume would tend to increase the spending multiplier. A decreased velocity of money, an increase in the marginal propensity to save, and an increase in the real interest rate would not have a direct positive impact on the spending multiplier. |
A |
| minimax | A. An increase in the marginal propensity to consume | A |
| kimi | A. An increase in the marginal propensity to consume | A |
| wenxinyiyan | A Explanation: The spending multiplier measures the change in total output (or income) that results from a change in autonomous spending (such as government spending, investment, or exports). The formula for the multiplier is 1 / (1 - MPC), where MPC stands for marginal propensity to consume. A. An increase in the marginal propensity to consume (MPC) would increase the numerator of the multiplier formula (since 1 is a constant) and decrease the denominator (since 1 - MPC would be smaller). Both effects lead to a larger multiplier. B. The velocity of money is not directly related to the spending multiplier. Velocity measures how fast money circulates in the economy, while the multiplier focuses on the impact of changes in spending on total output. C. An increase in the marginal propensity to save (MPS) would decrease the marginal propensity to consume (MPC) since MPC + MPS = 1. A lower MPC would lead to a smaller multiplier. D. The real interest rate affects investment spending but not directly the spending multiplier. A higher real interest rate might discourage investment, reducing autonomous spending and thus having an indirect effect on the multiplier by reducing the initial change in spending that triggers the multiplier process. However, this does not directly increase the multiplier itself. |
A |
| zhipu | A. An increase in the marginal propensity to consume The spending multiplier is positively related to the marginal propensity to consume (MPC). When the MPC increases, people spend a larger portion of any additional income they receive, which leads to a greater overall increase in aggregate demand. This enhances the multiplier effect. The other options either decrease the multiplier or are not directly related to it in the same way. |
A |
| gpto1 | A | A |