问题如下：
Based on Exhibit 1, Olabudo should:
选项：
A.conclude that the inflation predictions are unbiased.
reject the null hypothesis that the slope coefficient equals 1.
reject the null hypothesis that the intercept coefficient equals 0.
解释：
A is correct. If the consensus inflation forecast is unbiased, then the intercept, b0, should equal 0, and the slope coefficient, b1, should equal 1. The t-statistic for the intercept coefficient is 0.5351, which is less than the critical t-value of 2.0, so the intercept coefficient is not statistically different than 0. To test whether the slope coefficient equals 1, the t-statistic is calculated as: t=–1.0968
Because the absolute value of the t-statistic of –1.0968 is less than the critical t-value of 2.0, the slope coefficient is not statistically different than 1. Therefore, Olabudo can conclude that the inflation forecasts are unbiased.
请问关于If the consensus inflation forecast is unbiased, then the intercept, b0, should equal 0, and the slope coefficient, b1, should equal 1，这个知识点是经济学的吗？为什么unbiased就是intercept为0，slope coefficient就是1呢？
