Describir: Random processes and the growth of firms :

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