Longstanding concerns about hiring and diversity issues in Silicon Valley recently returned to the fore. The Labor Department recently filed suit against big data firm Palantir, alleging that it had engaged in a pattern of denying jobs to Asian applicants. Race is a greater impediment than gender when it comes to breaking through corporate glass ceilings, suggests research conducted by Ascend. “Overlooked in the popular diversity discussion has been the issue of an Asian glass ceiling at the highest management levels,” said Ascend EVP Anna Mok.