Describir: Random processes and the growth of firms :

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