stata做probit回归中的Log likelihood

stata做probit回归中的Log likelihood

表示  对数似然值
其值一般为负数，但是有时候也是可以为正数的

解释：The likelihood is the product of the density evaluated at the observations. Usually, the density takes values that are smaller than one, so its logarithm will be negative. However, this is not true for every distribution.
一般是越大越好，通常结果还会给出-2*log-likelihood，这个值应该越小越好