The human occupation history of Southeast Asia (SEA) remains heavily debated. Current evidence suggests that SEA was occupied by Hòabìnhian hunter-gatherers until ~4000 years ago, when farming economies developed and expanded, restricting foraging groups to remote habitats. Some argue that agricultural development was indigenous; others favor the "two-layer" hypothesis that posits a southward expansion of farmers giving rise to present-day Southeast Asian genetic diversity. By sequencing 26 ancient human genomes (25 from SEA, 1 Japanese Jōmon), we show that neither interpretation fits the complexity of Southeast Asian history: Both Hòabìnhian hunter-gatherers and East Asian farmers contributed to current Southeast Asian diversity, with further migrations affecting island SEA and Vietnam. Our results help resolve one of the long-standing controversies in Southeast Asian prehistory.

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Trade shows are a key vehicle where SMEs often develop networks, through which valuable resources for internationalisation can be acquired. However, there tends to be a scarcity of research on the performance outcomes of network development of international SMEs (ISMEs), particularly, in trade show forums. Adopting a network-based view, we investigate the influence of trade shows on the performance of ISMEs. Results from a survey of 229 Australian and New Zealand SMEs indicate that proactiveness is positively associated with the development of networks through trade shows, which, in turn, increases the firms’ operational performance, but not financial performance. In addition, the effect of trade shows is generally more beneficial for ISMEs in the service industry, compared to other industries.

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