Pengaruh pengungkapan informasi intelectual capital pada prospektus IPO terhadap underpricing saham, studi pada perusahaan yang tercatat di Bursa Efek Indonesia periode 2015 – 2019 = The effect of disclosure of intellectual capital information on the IPO prospectus on stock underpricing, studies on companies listed on The Indonesia Stock Exchange for the period of 2015 - 2019