Climate effects on the diversification strategy of export firms: Evidence from China

resilient future, ensuring that the economic impacts of climate change are mitigated and that businesses, especially export firms, can continue to thrive in an increasingly unpredictable cli- mate landscape. Author Contributions Conceptualization: Junmei Zhang. Data curation: Junmei Zhang. Formal analysis: Junmei Zhang. Funding acquisition: Junmei Zhang, Lianying Yao. Investigation: Lianying Yao. Methodology: Junmei Zhang. Project administration: Junmei Zhang. Supervision: Lianying Yao. Validation: Junmei Zhang. Visualization: Junmei Zhang. Writing – original draft: Junmei Zhang. Writing – review & editing: Junmei Zhang, Lianying Yao. References 1. Bohra-Mishra P, Oppenheimer M, Hsiang S M. Nonlinear permanent migration response to climatic var- iations but minimal response to disasters. Proceedings of the National Academy of Sciences. 2014; 111(27): 9780–9785. https://doi.org/10.1073/pnas.1317166111 PMID: 24958887 2. Huang K, Zhao H, Huang J, et al. The impact of climate change on the labor allocation: Empirical evi- dence from China. Journal of Environmental Economics and Management. 2020; 104: 102376. 3. Ouyang Y, Sun C, Wei X, et al. Will temperature changes in the host country reduce the inflow of inter- national direct investment? Micro evidence from Chinese listed companies. Environmental and Resource Economics. 2023; 1–26. 4. Deschênes O, Greenstone M, Guryan J. Climate change and birth weight. American Economic Review. 2009; 99(2): 211–17. https://doi.org/10.1257/aer.99.2.211 PMID: 29505213

5. Fishman R, Carrillo P, Russ J. Long-term impacts of exposure to high temperatures on human capital and economic productivity. Journal of Environmental Economics and Management. 2019; 93: 221– 238. 6. Braguinsky S, Ohyama A, Okazaki T, et al. Product innovation, product diversification, and firm growth: Evidence from Japan’s early industrialization. American Economic Review. 2021; 111(12): 3795–3826. 7. Lendle A, Ve´ zina P L. Internet technology and the extensive margin of trade: evidence from ebay in emerging economies. Review of Development Economics. 2015; 19(2): 375–386. 8. Mayer T, Melitz M J, Ottaviano G I P. Market size, competition, and the product mix of exporters. Ameri- can Economic Review. 2014; 104(2): 495–536. 9. Lu Y, Tao Z, Zhang Y. How do exporters adjust export product scope and product mix to react to anti- dumping? China Economic Review. 2018; 51: 20–41. 10. Melitz M J. The impact of trade on intra-industry reallocations and aggregate industry productivity. Econometrica. 2003; 71(6): 1695–1725. 11. Bernard A B, Redding S J, Schott P K. Multiple-product firms and product switching. American Eco- nomic Review. 2010; 100(1): 70–97. 12. Nocke V, Yeaple S. Globalization and multiproduct firms. International Economic Review. 2014; 55(4): 993–1018. 13. Nocke V, Schutz N. Multiproduct-firm oligopoly: An aggregative games approach, Econometrica. 2018; 86(2): 523–557. PLOS ONE Climate effects on the diversification strategy of export firms PLOS ONE | https://doi.org/10.1371/journal.pone.0308391 August 16, 2024 26 / 28