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Résumés
Résumé
La pandémie de Covid-19 a eu des répercussions sans précédent sur de nombreuses entreprises. L’objectif de cet article est d’étudier l’influence de l’optimisme situé sur la capacité de l’entrepreneur à surmonter le stress perçu en période de crise. Notamment, lorsqu’il est pris entre le marteau (problèmes financiers résultants des mesures sanitaires) et l’enclume (obstacles au financement). La méthode de recherche adoptée est une étude quantitative en coupe instantanée auprès de 677 dirigeants de PME et travailleurs autonomes. Une analyse par la méthode des équations structurelles basée sur les moindres carrés partiels (PLS) a permis de révéler l’effet médiateur de l’optimisme situé sur le stress lié aux problèmes financiers induits de la crise. Les problèmes financiers rencontrés durant la pandémie ont été une source de stress pour de nombreux entrepreneurs. Les résultats montrent que dans ce contexte de crise, l’optimisme situé est une ressource psychologique à ne pas négliger pour leur permettre de faire face au stress perçu.
Mots-clés:
- Covid-19,
- Entrepreneur(e),
- Financement,
- Optimisme,
- Stress
Abstract
The Covid-19 pandemic had unprecedented repercussions on many companies. The aim of this article is to study the influence of situated optimism on the entrepreneur’s ability to overcome stress in times of crisis. Especially, when s/he is stuck between the devil (financial problems resulting from crisis measures) and the deep blue sea (financing obstacles). The research method adopted is a cross-sectional quantitative study on 677 SME managers and self-employed. The use of the partial least squares (PLS) structural equation method revealed the mediating effect of situated optimism on stress induced by financial problems. The financial issues encountered during the pandemic have been a source of stress for many entrepreneurs. The results show that in this context of crisis, situated optimism is a psychological resource that should not be neglected to enable them to cope with perceived stress.
Keywords:
- Covid-19,
- Entrepreneur,
- Funding,
- Optimism,
- Stress
Resumen
La pandemia del Covid-19 ha tenido repercusiones sin precedentes en muchas empresas. El objetivo de este artículo es estudiar la influencia del optimismo situado sobre la capacidad del emprendedor para superar el estrés percibido en tiempos de crisis. En particular, cuando éste queda atrapado entre la espada (problemas económicos derivados de las medidas sanitarias) y la pared (obstáculos para financiarse). Con respecto a la metodología de esta investigación, se ha realizado un estudio cuantitativo transversal de 677 dirigentes de PyME y trabajadores autónomos (por cuenta propia). Un análisis de ecuaciones estructurales basado en mínimos cuadrados parciales (PLS) reveló el efecto mediador del optimismo situado sobre el estrés relacionado con los problemas financieros inducidos por la crisis. Los problemas financieros encontrados durante la pandemia han sido una fuente de estrés para muchos empresarios. Los resultados muestran que, en este contexto de crisis, el optimismo situado es un recurso psicológico que no debe descuidarse para permitirles afrontar el estrés percibido.
Palabras clave:
- Covid-19,
- Emprendedor(a),
- Financiamiento,
- Optimismo,
- Estrés
Parties annexes
Références
- Adomako, S., Danso, A., Uddin, M. et Damoah, J.O. (2016). Entrepreneurs’ optimism, cognitive style and persistence. International Journal of Entrepreneurial Behavior & Research, 22(1), 84-108.
- Alekseev, G., Amer, S., Gopal, M., Kuchler, T., Schneider, J.W., Stroebel, J. et Wernerfelt, N. (2020). The effects of Covid-19 on US small businesses : evidence from owners, managers, and employees. Récupéré le 15 septembre 2020 sur le site : http://dx.doi.org/10.2139/ssrn.3692733.
- Alesch, D., Holly, J., Mittler, E. et Nagy, R. (2001). Organizations at risk : what happens when small business and not-for profits encounter natural disasters ? (technical report). Fairfax, Public Entity Risk Institute.
- Armor, D.A. et Taylor, S.E. (1998). Situated optimism : specific outcome expectancies and self-regulation. Advances in Experimental Social Psychology, 30, 309-379.
- Asgary, A., Anjum, M.I. et Azimi, N. (2012). Disaster recovery and business continuity after the 2010 flood in Pakistan case of small businesses. International Journal of Disaster Risk Reduction, 2(C), 46-56.
- Avey, J.B., Luthans, F. et Youssef, C.M. (2010). The additive value of positive psychological capital in predicting work attitudes and behaviours. Journal of Management, 36(2), 430-452.
- Bacq, S., Geoghegan, W., Josefy, M., Stevenson, R. et Williams, T.A. (2020). The Covid-19 virtual idea blitz : marshaling social entrepreneurship to rapidly respond to urgent grand challenges. Business Horizons, 63(6), 705-723.
- Banque de développement du Canada (2020). Rapport sur la santé mentale et le bien-être des entrepreneurs canadiens. Récupéré le 20 novembre 2020 sur le site : www.bdc.ca/fr/a-propos/analyses-recherche/rapport-sante-mentale-bien-etre-entrepreneurs-canadiens.
- Bapuji, H., Patel, C., Ertug, G. et Allen, D.G. (2020). Corona crisis and inequality : why management research needs a societal turn. Journal of Management, 46(7), 1205-1222.
- Baron, R.A., Franklin, R.J. et Hmieleski, K.M. (2016). Why entrepreneurs often experience low, not high, levels of stress : the joint effects of selection and psychological capital. Journal of Management, 42(3), 742-768.
- Baron, R.A., Hmieleski, K.M. et Henry, R.A. (2012). Entrepreneurs’ dispositional positive affect : the potential benefits–and potential costs of being up. Journal of Business Venturing, 27(3), 310-324.
- Bartik, A.W., Bertrand, M., Cullen, Z., Glaeser, E.L., Luca, M. et Stanton, C. (2020). The impact of Covid-19 on small business outcomes and expectations. Proceedings of the National Academy of Sciences, 117(30), 17656-17666.
- Battisti, M. et Deakins, D. (2017). The relationship between dynamic capabilities, the firm’s resource base and performance in a post-disaster environment. International Small Business Journal, 35(1), 78-98.
- Becker, T.E. (2005). Potential problems in the statistical control of variables in organizational research : a qualitative analyis with recommendations. Organizational Research Methods, 8(3), 274-289.
- Bhuiyan, M.F. et Ivlevs, A. (2019). Micro-entrepreneurship and subjective well-being : evidence from rural Bangladesh. Journal of Business Venturing, 34(4), 625-645.
- Block, J.H., Fisch, C. et Hirschmann, M. (2021). The determinants of bootstrap financing in crises : evidence from entrepreneurial ventures in the Covid-19 pandemic. Small Business Economics, 1-19.
- Bogle, J.C. et Sullivan, R.N. (2009). Markets in crisis. Financial Analysts Journal, 65(1), 17-24.
- Brooks, S.K., Webster, R.K., Smith, L.E., Woodland, L., Wessely, S., Greenberg, N. et Rubin, G.J. (2020). The psychological impact of quarantine and how to reduce it : rapid review of the evidence. The Lancet, 395(10227), 912-920.
- Bullough, A., Renko, M. et Myatt, T. (2014). Danger zone entrepreneurs : the importance of resilience and self-efficacy for entrepreneurial intentions. Entrepreneurship Theory and Practice, 38(3), 473-499.
- Cacciotti, G. et Hayton, J.C. (2015). Fear and entrepreneurship : a review and research agenda. International Journal of Management Reviews, 17(2), 165-190.
- Cacciotti, G., Hayton, J.C., Mitchell, J.R. et Giazitzoglu, A. (2016). A reconceptualization of fear of failure in entrepreneurship. Journal of Business Venturing, 31(3), 302-325.
- Chang, E.C., D’Zurilla, T.J. et Maydeu-Olivares, A. (1994). Assessing the dimensionality of optimism and pessimism using a multimeasure approach. Cognitive Therapy and Research, 18(2), 143-160.
- Chang, E.C., Rand, K.L. et Strunk, D.R. (2000). Optimism and risk for job burnout among working college students : stress as a mediator. Personality and Individual Differences, 29(2), 255-263.
- Chen, J., Cheng, Z., Gong, K. et Li, J. (2020). Riding out the Covid-19 storm : how government policies affect SMEs in China. Récupéré le 22 septembre 2020 sur le site : http://dx.doi.org/10.2139/ssrn.3660232.
- Chin, W.W. (2010). How to write up and report PLS analyses. Dans V.E. Vinzi (dir.), Handbook of partial least squares (p. 655-690). Berlin, Allemagne, Springer.
- Cohen, S., Mermelstein, R. et Kamarck, T. (1983). A global measure of perceived stress. Journal of Health and Social Behavior, 24(4), 385-396.
- Coibion, O., Gorodnichenko, Y. et Weber, M. (2020). Labor markets during the Covid-19 crisis : a preliminary view. Récupéré le 13 novembre 2020 sur le site : www.nber.org/papers/w27017.
- Cope, J. (2005). Toward a dynamic learning perspective of entrepreneurship. Entrepreneurship Theory and Practice, 29(4), 373-397.
- Cowling, M., Brown, R. et Rocha, A. (2020). Did you save some cash for a rainy Covid-19 day ? The crisis and SMEs. International Small Business Journal, 1-12.
- Cowling, M., Liu, W. et Ledger, A. (2012). Small business financing in the UK before and during the current financial crisis. International Small Business Journal, 30(7), 778-800.
- Davidsson, P. et Gordon, S.R. (2016). Much ado about nothing ? The surprising persistence of nascent entrepreneurs through macroeconomic crisis. Entrepreneurship Theory and Practice, 40(4), 915-941.
- Doern, R. (2016). Entrepreneurship and crisis management : the experiences of small businesses during the London 2011 riots. International Small Business Journal, 34(3), 276-302.
- Doern, R., Williams, N. et Vorley, T. (2019). Special issue on entrepreneurship and crises : business as usual ? An introduction and review of the literature. Entrepreneurship & Regional Development, 31(5-6), 400-412.
- Dunn, P. et Cheatham, L. (1993). Fundamentals of small business financial management for start-up, survival, growth, and changing economic circumstances. Managerial Finance, 19(8), 1-13.
- Elhem, B.F., Ezzeddine, B.M. et Boudabbous, S. (2015). Does entrepreneur dispositional optimism bias affect small firms’ technical efficiency. International Journal of Entrepreneurship and Small Business, 24(3), 302-321.
- Fang He, V., Sirén, C., Singh, S., Solomon, G. et von Krogh, G. (2018). Keep calm and carry on : emotion regulation in entrepreneurs’ learning from failure. Entrepreneurship Theory and Practice, 42(4), 605-630.
- Femmessor (2020). Regard sur l’entrepreneuriat féminin en période de Covid-19. Récupéré le 15 juillet 2020 sur le site : https://femmessor.com/covid-19.
- Fernandes, V. (2012). En quoi l’approche PLS est-elle une méthode a (re)-découvrir pour les chercheurs en management ? M@ngement, 15(1), 101‑123.
- Gao, J., Zheng, P., Jia, Y., Chen, H., Mao, Y., Chen, S., Wang, Y., Fu, H. et Dai, J. (2020). Mental health problems and social media exposure during Covid-19 outbreak. Plos One, 15(4).
- Gardner, P.J. et Moallef, P. (2015). Psychological impact on SARS survivors : critical review of the English language literature. Canadian Psychology/Psychologie canadienne, 56(1), 123.
- Geers, A.L., Wellman, J.A. et Lassiter, G.D. (2009). Dispositional optimism and engagement : the moderating influence of goal prioritization. Journal of Personality and Social Psychology, 96(4), 913-932.
- Geroski, P.A. et Gregg, P. (1996). What makes firms vulnerable to recessionary pressures ? European Economic Review, 40(3-5), 551-557.
- Giones, F., Brem, A., Pollack, J.M., Michaelis, T.L., Klyver, K. et Brinckmann, J. (2020). Revising entrepreneurial action in response to exogenous shocks : considering the Covid-19 pandemic. Journal of Business Venturing Insights, 14.
- Gish, J.J., Wagner, D.T., Grégoire, D.A. et Barnes, C.M. (2019). Sleep and entrepreneurs’ abilities to imagine and form initial beliefs about new venture ideas. Journal of Business Venturing, 34(6), 1-24.
- Görgens-Ekermans, G. et Steyn, R. (2016). Optimism, self-efficacy and meaningfulness : a structural model of subjective well-being at work. Management Dynamics, 25(4), 34-51.
- Hair, J.F., Hult, G.T.M., Ringle, C. et Sarstedt, M. (2013). A primer on partial least squares structural equation modeling (PLS-SEM) (1re édition). Thousand Oaks, Sage Publications.
- Hayes, A.F. et Scharkow, M. (2013). The relative trustworthiness of inferential tests of the indirect effect in statistical mediation analysis : does method really matter ? Psychological Science, 24(10), 1918-1927.
- Hayward, M.L.A., Forster, W.R., Sarasvathy, S.D. et Fredrickson, B.L. (2010). Beyond hubris : how highly confident entrepreneurs rebound to venture again. Journal of Business Venturing, 25(6), 569-578.
- Henseler, J., Hubona, G. et Ray, P.A. (2016). Using PLS path modeling in new technology research : updated guidelines. Industrial Management & Data Systems, 116(1), 2-20.
- Henseler, J., Ringle, C.M. et Sarstedt, M.A. (2015). New criterion for assessing discriminant validity in variance-based strctural equation modeling. Journal of the Academy of Marketing Science, 43(1), 115-135.
- Herbane, B. (2010). Small business research : time for a crisis-based view. International Small Business Journal, 28(1), 43-64.
- Hmieleski, K. et Baron, R. (2009). Entrepreneurs’ optimism and new venture performance : a social cognitive perspective. The Academy of Management Journal, 52(3), 473-488.
- Hobfoll, S.E. (2011a). Conservation of resources theory : its implication for stress, health, and resilience. Dans S. Folkman (dir.), Oxford library of psychology. The Oxford handbook of stress, health, and coping (p. 127-147). Oxford, Royaume-Uni, Oxford University Press.
- Hobfoll, S.E. (2011b). Conservation of resource caravans and engaged settings. Journal of Occupational and Organizational Psychology, 84(1), 116-122.
- Irvine, W. et Anderson, A. (2004). Small tourist firms in rural areas : agility, vulnerability and survival in the face of crisis. International Journal of Entrepreneurial Behaviour & Research, 10(4), 229-246.
- Jarvis, R., Curran, J., Kitching, J. et Lightfoot, G. (2000). The use of quantitative and qualitative criteria in the measurement of performance in small firms. Journal of Small Business and Enterprise Development, 7(2), 123-134.
- Jones, C., Hine, D.W. et Marks, A.D. (2017). The future is now : reducing psychological distance to increase public engagement with climate change. Risk Analysis, 37(2), 331-341.
- Kawaguchi, K., Kodama, N. et Tanaka, M. (2020). Small business under the Covid-19 crisis : expected short – and medium-run effects of anti-contagion and economic policies. Récupéré le 10 septembre 2020 sur le site : http://dx.doi.org/10.2139/ssrn.3634544.
- Kock, N. (2015). Common method bias in PLS-SEM : a full collinearity assessment approach. International Journal of e-Collaboration, 11(4), 1-10.
- Kuckertz, A., Brändle, L., Gaudig, A., Hinderer, S., Reyes, C.A.M., Prochotta, A. et Berger, E.S. (2020). Star-tup in times of crisis a rapid response to the Covid-19 pandemic. Journal of Business Venturing Insights, 13.
- Kwong, C.C.Y., Cheung, C.W.M., Manzoor, H. et Rashid, M.U. (2019). Entrepreneurship through bricolage : a study of displaced entrepreneurs at times of war and conflict. Entrepreneurship & Regional Development, 31(5-6), 435-455.
- Lai, Y., Saridakis, G., Blackburn, R. et Johnstone, S. (2016). Are the HR responses of small firms different from large firms in times of recession ? Journal of Business Venturing, 31(1), 113-131.
- Latham, S. (2009). Contrasting strategic response to economic recession in start‐up versus established software firms. Journal of Small Business Management, 47(2), 180-201.
- Le, H., Nguyen, T., Ngo, C., Pham, T. et Le, T. (2020). Policy related factors affecting the survival and development of SMEs in the context of Covid-19 pandemic. Management Science Letters, 10(15), 3683-3692.
- Lechat, T. et Torrès, O. (2017). Stressors and satisfactors in entrepreneurial activity : an event-based, mixed methods study predicting small business owners’ health. International Journal of Entrepreneurship and Small Business, 32(4), 537-569.
- Lindblom, A., Lindblom, T. et Wechtler, H. (2020). Dispositional optimism, entrepreneurial success and exit intentions : the mediating effects of life satisfaction. Journal of Business Research, 120, 230-240.
- Lowry, P.B. et Gaskin, J. (2014). Partial least squares (PLS) structural equation modeling (SEM) for building and testing behavioral causal theory : when to choose it and how to use it. IEEE Transactions on Professional Communication, 57(2), 123-146.
- Luthans, F., Norman, S.M., Avolio, B.J. et Avey, J.B. (2008). The mediating role of psychological capital in the supportive organizational climate‐employee performance relationship. Journal of Organizational Behavior, 29(2), 219-238.
- Ministère de l’Économie et de l’Innovation (2020). Appel à projets : appui aux initiatives innovantes pour la santé et le bien-être des fondateurs de start-up. Récupéré le 20 décembre 2019 sur le site : https://www.economie.gouv.qc.ca/fileadmin/contenu/programmes/aide_financiere/aide_entrepreneuriat/guide_appel_soutien_fondateurs.pdf.
- Mitchell, R.K., Randolph-Seng, B. et Mitchell, J.R. (2011). Socially situated cognition : imagining new opportunities for entrepreneurship research. Academy of Management Review, 36(4), 774-776.
- Morgan, J. et Sisak, D. (2016). Aspiring to succeed : a model of entrepreneurship and fear of failure. Journal of Business Venturing, 31(1), 1-21.
- Muñoz, P., Kimmitt, J., Kibler, E. et Farny, S. (2019). Living on the slopes : entrepreneurial preparedness in a context under continuous threat. Entrepreneurship & Regional Development, 31(5-6), 413-434.
- Ngah-Kiing Lim, E., Das, S.S. et Das, A. (2009). Diversification strategy, capital structure, and the Asian financial crisis (1997-1998) : evidence from Singapore firms. Strategic Management Journal, 30(6), 577-594.
- Nunnally, J.C. et Bernstein, I.H. (1994). The assessment of reliability. Psychometric Theory, 3(1), 248‑292.
- O’brien, R.M. (2007). A caution regarding rules of thumb for variance inflation factors. Quality & Quantity, 41(5), 673-690.
- OCDE (2020a). Les réponses politiques des PME. Récupéré le 10 mars 2021 sur le site : www.oecd.org/coronavirus/policy-responses/coronavirus-covid-19-sme-policy-responses-04440101.
- OCDE (2020b). Les réponses de politiques fiscale et budgétaire à la crise du coronavirus : accroître la confiance et la résilience. Récupéré le 10 mars 2021 sur le site : https://read.oecd-ilibrary.org/view/?ref=134_134809-cbvd41ov8s&title=Les-reponses-de-politiques-fiscale-et-budgetaire-a-la-crise-du-coronavirus-Accroitre-la-confiance-et-la-resilience.
- Organisation mondiale de la santé (2020). Who director-general’s remarks at the media briefing on 2019-ncov on 11 february 2020. Récupéré le 10 novembre 2020 sur le site : www.who.int/dg/speeches/detail/who-director-general-s-remarks-at-the-media-briefing-on-2019-ncov-on-11-february-2020.
- Pearson, C.M. et Clair, J.A. (1998). Reframing crisis management. Academy of Management Review, 23(1), 59-76.
- Peterson, C. (2000). The future of optimism. American Psychologist, 55(1), 44.
- Rasmussen, H.N., Scheier, M.F. et Greenhouse, J.B. (2009). Optimism and physical health : a meta-analytic review. Annals of Behavioral Medicine, 37(3), 239-256.
- Ratten, V. (2020). Coronavirus and international business : an entrepreneurial ecosystem perspective. Thunderbird International Business Review, 62(5), 629-634.
- Rauch, A., Fink, M. et Hatak, I. (2018). Stress processes : an essential ingredient in the entrepreneurial process. Academy of Management Perspectives, 32(3), 340-357.
- Roundy, P.T. (2019). Back from the brink : the revitalization of inactive entrepreneurial ecosystems. Journal of Business Venturing Insights, 12.
- Roussel, P., Durrieu, F. et Campoy, E. (2002). Méthodes d’équations structurelles : recherche et applications en gestion. Paris, Economica.
- Runyan, R.C. (2006). Small business in the face of crisis : identifying barriers to recovery from a natural disaster. Journal of Contingencies and Crisis Management, 14(1), 12-26.
- Scheier, M.F. et Carver, C.S. (1985). Dispositional optimism and physical well-being : the influence of generalized expectancies on health. Health Psychology, 5(2), 219-247.
- Scheier, M.F., Carver, C.S. et Bridges, M.W. (2001). Optimism, pessimism, and psychological well-being. Dans E.C. Chang (dir.), Optimism and pessimism : implications for theory, research and practice (p. 189-216). Washington D.C., États-Unis, American Psychological Association.
- Segerstrom, S.C. et Solberg Nes, L.S. (2006). When goals conflict but people prosper : the case of dispositional optimism. Journal of Research in Personality, 40(5), 675-693.
- Shepherd, D.A. (2003). Learning from business failure : propositions of grief recovery for the self-employed. Academy of Management Review, 28(2), 318-328.
- Shepherd, D.A., Saade, F.P. et Wincent, J. (2020). How to circumvent adversity ? Refugee-entrepreneurs’ resilience in the face of substantial and persistent adversity. Journal of Business Venturing, 35(4), 105940.
- Shepherd, D.A. et Williams, T.A. (2018). Hitting rock bottom after job loss : bouncing back to create a new positive work identity. Academy of Management Review, 43(1), 28-49.
- Smallbone, D., Deakins, D., Battisti, M. et Kitching, J. (2012). Small business responses to a major economic downturn : empirical perspectives from New Zealand and the United Kingdom. International Small Business Journal, 30(7), 754-777.
- Solberg Nes, L.S., Segerstrom, S.C. et Sephton, S.E. (2005). Engagement and arousal : optimisms effects during a brief stressor. Personality and Social Psychology Bulletin, 31(1), 111-120.
- Spigel, B. et Vinodrai, T. (2020). Meeting its Waterloo ? Recycling in entrepreneurial ecosystems after anchor firm collapse. Entrepreneurship & Regional Development, 1-22.
- Spillan, J. et Hough, M. (2003). Crisis planning in small businesses : importance, impetus, and indifference. European Management Journal, 21(3), 398-407.
- Stephan, U. (2018). Entrepreneurs’ mental health and well-being : a review and research agenda. Academy of Management Perspectives, 32(3), 290-322.
- Taylor, S., Landry, C., Paluszek, M., Fergus, T.A., McKay, D. et Asmundson, G.J. (2020). Development and initial validation of the Covid stress scales. Journal of Anxiety Disorders, 72, 102-232.
- Thompson, N.A., van Gelderen, M. et Keppler, L. (2020). No need to worry. Anxiety and coping in the entrepreneurship process. Frontiers in Psychology, 11, 398.
- Van Bavel, J.J., Baicker, K., Boggio, P.S., Capraro, V., Cichocka, A., Cikara, M. et Drury, J. (2020). Using social and behavioural science to support Covid-19 pandemic response. Nature Human Behaviour, 4, 1-12.
- Wiklund, J., Hatak, I., Lerner, D.A., Verheul, I., Thurik, R. et Antshel, K. (2020). Entrepreneurship, clinical psychology and mental health : an exciting and promising new field of research. Academy of Management Perspectives, 34(2), 291-295.
- Williams, T.A., Gruber, D.A., Sutcliffe, K.M., Shepherd, D.A. et Zhao, E.Y. (2017). Organizational response to adversity : fusing crisis management and resilience research streams. Academy of Management Annals, 11(2), 733-769.
- Williams, T.A. et Shepherd, D.A. (2016). Building resilience or providing sustenance : different paths of emergent ventures in the aftermath of the Haiti earthquake. Academy of Management Journal, 59(6), 2069-2102.
- Winston, A. (2020). Is the Covid-19 outbreak a black swan or the new normal ? MIT sloan management review. Récupéré le 16 mars 2020 sur le site : https://sloanreview.mit.edu/article/is-the-covid-19-outbreak-a-black-swan-or-the-new-normal.
- Wood, M.S., Bradley, S.W. et Artz, K. (2015). Roots, reasons, and resources : situated optimism and firm growth in subsistence economies. Journal of Business Research, 68(1), 127-136.
- Zubair, A. et Kamal, A. (2015). Work related flow, psychological capital and creativity among employees of software houses. Psychological Studies, 60(3), 321-331.