【单选题】Suppose that there were 25 people who had a reservation price of $500, and the 26th person had a reservation price of $200. What would the equilibrium price be if there were 26 apartments to rent?
【简答题】已知数列{a n }中,a 1 =2,a n -a n-1 -2n=0(n≥2,n∈N). (1)写出a 2 、a 3 的值(只写结果)并求出数列{a n }的通项公式; (2)设 b n = 1 a n+1 + 1 a n+2 + 1 a n+3 +…+ 1 a 2n ,若对任意的n,当m∈[-1,1]时,不等式 t 2 -2mt+ 1 6 > b n 恒成立,求实数t的取值范围.
【单选题】Suppose that there were 25 people who had a reservation price of $500, and the 26th person had a reservation price of $200. What would the equilibrium price be if there were 24 apartments to rent?
【判断题】Suppose that there exist two parameter values satisfying that moment conditions equal 0, then it is possible to obtain a consistent consistent GMM estimator (the model is not identified).