Describir: Random processes and the growth of firms :

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