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

  _____    _    _     ______     ___     _    _   
 /  ___|| | || | ||  /_   _//   / _ \\  | || | || 
| // __   | || | ||  `-| |,-   | / \ || | || | || 
| \\_\ || | \\_/ ||    | ||    | \_/ || | \\_/ || 
 \____//   \____//     |_||     \___//   \____//  
  `---`     `---`      `-`'     `---`     `---`