The document discusses the prosodic typology of Tibetan dialects, specifically focusing on tone patterns in disyllabic words. It finds that archaic non-tonal dialects spoken in western and eastern Tibet have stress on the second syllable of disyllabic words, while central innovative tonal dialects have tone contrasts. This suggests Proto-Tibetan likely had second syllable stress on disyllabic words. Acoustic analyses of modern dialects show pitch and pitch slope correlate with stress, indicating these were likely prosodic cues in Proto-Tibetan as well.