أرسل هذا في رسالة قصيرة: A copula-based stochastic frontier model and efficiency analysis: Evidence from stock exchange of Thailand

 _    _      ___    __    __     ___     _    _   
| |  | ||   / _ \\  \ \\ / //   / _ \\  | |  | || 
| |/\| ||  / //\ \\  \ \/ //   / //\ \\ | |/\| || 
|  /\  || |  ___  ||  \  //   |  ___  |||  /\  || 
|_// \_|| |_||  |_||   \//    |_||  |_|||_// \_|| 
`-`   `-` `-`   `-`     `     `-`   `-` `-`   `-`