“…Adapted from prior literatures about R&D intensity, which represents an innovated firm's effort on R&D investment (Hashai and Almor 2008;Nunes, Serrasqueiro, and Leitão 2012;Honoré, Munari, and de La Potterie 2015), we define a term of BDA intensity to denote how much effort a health care wearable device firm has made on BDA investment. Prior R&D intensity studies have empirically examined the factors that significantly affect firms' optimal R&D intensity investments (Hashai and Almor 2008;Dabić et al 2012;Han et al 2015) and how their R&D intensity affects firms' performances on the market (Nunes, Serrasqueiro, and Leitão 2012;Wu 2012;Lee, Wu, and Pao 2014;Honoré, Munari, and de La Potterie 2015). Different from their works, we study health care wearable device firm's optimal specific R&D intensity (BDA intensity) investment and the consequences of firm's intensity on the market competition through an analytical framework, which has potentials to provide theoretical foundations to understand the R&D intensity choice.…”