5.4 Joint maximum likelihood estimation
When assuming all students are independent, the joint likelihood The joint maximum likelihood estimation (JMLE) finds that can maximize or its logarithm.
Neyman & Scott (1948) has showed that JMLE produced problematic estimates of parameters related with individuals.
References
Neyman, J., & Scott, E. L. (1948). Consistent estimates based on partially consistent observations. Econometrica, 16, 1–32.