Text this

Number:

Provider:

CAPTCHA:

           _    _   __    __    ______   _    _   
  ____    | || | || \ \\ / //  /_   _// | |  | || 
 |    \\  | || | ||  \ \/ //    -| ||-  | |/\| || 
 | [] ||  | \\_/ ||   \  //     _| ||_  |  /\  || 
 |  __//   \____//     \//     /_____// |_// \_|| 
 |_|`-`     `---`       `      `-----`  `-`   `-` 
 `-`

Please enter what you see:

Text this: The Effects of Patent Characteristics as Signals on the Growth of Follow-on Innovations: Evidence from Chinese Patenting Activities in U.S