问题


There is a single choice question about econometrics. Answer the question by replying A, B, C or D.
Question: If a Durbin Watson statistic takes a value close to zero, what will be the value of the first order autocorrelation coefficient?
A. Close to zero
B. Close to plus one
C. Close to minus one
D. Close to either minus one or plus one
Answer:

答案

模型 模型答案 正确答案
金声玉亮2.0

B. Close to plus one.

The Durbin-Watson (DW) statistic is used to test for the presence of first-order autocorrelation in the residuals of a regression model. The DW statistic ranges from 0 to 4, with a value of 2 indicating no autocorrelation.

If the DW statistic is close to 0, it indicates positive autocorrelation, meaning that the residuals are positively correlated with each other. In this case, the first-order autocorrelation coefficient (ρ) is close to +1.

So, the correct answer is B. Close to plus one.
C
deepseekr1

Answer: B. Close to plus one
The Durbin Watson (DW) statistic is approximately related to the first-order autocorrelation coefficient (ρ) by the formula:
**DW ≈ 2(1 - ρ)**.
If the DW statistic is close to **0**, substituting into the formula gives:
**0 ≈ 2(1 - ρ) ⇒ ρ ≈ 1**.
This indicates **strong positive autocorrelation**, making **B** the correct choice.
C
gpto1 B C
GPT-4o B. Close to plus one C
llama3.1-70B-Instruct

C
C
llama3.1-405B-Instruct

B. Close to plus one.

The Durbin-Watson (DW) statistic is used to test for the presence of first-order autocorrelation in the residuals of a regression model. The DW statistic ranges from 0 to 4, with a value of 2 indicating no autocorrelation.

If the DW statistic is close to 0, it indicates positive autocorrelation, meaning that the residuals are positively correlated with each other. In this case, the first-order autocorrelation coefficient (ρ) is close to +1.

So, the correct answer is B. Close to plus one.
C
DeepSeek-Coder-V2 B. Close to plus one C
Qwen2-72B-Instruct B. Close to plus one C
baichuan4 B. Close to plus one C
doubao D

A Durbin-Watson statistic close to zero indicates significant positive autocorrelation, and the first order autocorrelation coefficient would be close to either -1 or +1.
C
minimax B. Close to plus one C
kimi B. Close to plus one C
wenxinyiyan C. Close to minus one

Explanation:
The Durbin-Watson (DW) statistic is a test for autocorrelation in the residuals from a regression analysis. It is specifically designed to detect first-order autocorrelation.

The DW statistic ranges from 0 to 4. A value of 2 indicates no autocorrelation. Values less than 2 suggest positive autocorrelation, while values greater than 2 suggest negative autocorrelation.

When the DW statistic is close to 0, it indicates a high degree of positive first-order autocorrelation in the residuals. However, it's important to note that the DW statistic itself is not the autocorrelation coefficient; it's a test statistic based on the residuals.

Now, to directly answer the question: A DW statistic close to zero does not directly give the value of the first-order autocorrelation coefficient. But it does suggest that the first-order autocorrelation coefficient is likely to be close to 1 (indicating strong positive autocorrelation). However, there's a catch in the wording of the question. The DW statistic close to zero indicates positive autocorrelation, which means the autocorrelation coefficient is close to +1, not -1.

If the question were asking about the sign of the autocorrelation, then the answer would be positive (or "plus"). But since the question specifically asks about the value of the first-order autocorrelation coefficient, and the options are in terms of proximity to zero or one (with a sign), the closest answer is "Close to plus one."

But please note a common misunderstanding: A DW statistic close to 0 does not mean the autocorrelation coefficient is close to 0; it means it's close to +1, indicating strong positive autocorrelation.

Therefore, the most accurate answer choice is B ("Close to plus one") if we interpret the question as asking about the general proximity and sign of the autocorrelation coefficient suggested by a DW statistic close to 0. If the question intended to test knowledge of the DW statistic itself and its interpretation, then the key point is that a value close to 0 indicates strong positive autocorrelation.
C
zhipu B. Close to plus one

The Durbin Watson statistic ranges from 0 to 4. A value close to 0 indicates strong positive autocorrelation, meaning the first-order autocorrelation coefficient is close to plus one. Conversely, a value close to 4 indicates strong negative autocorrelation, meaning the first-order autocorrelation coefficient is close to minus one. A value around 2 suggests no autocorrelation.
C
gpto1 B C