MAXIMUM LIKELIHOOD ESTIMATION OF GRAVITY MODEL PARAMETERS
证明了在非常温和的条件下，引力模型参数的最大似然估计存在且唯一（部分参数允许尺度变换），并提出了求解该估计的算法。
ABSTRACT. It is shown that, under some very mild conditions, maximum likelihood estimates of gravity model parameters exist and are unique (up to a scale transformation for some parameters). An algorithm for finding such estimates is also proposed.