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91.
This article describes the process of a learning study conducted in technology education in a Swedish preschool class. The learning study method used in this study is a collaborative method, where researchers and teachers work together as a team concerning teaching and learning about a specific learning object. The object of learning in this study concerns strong constructions and framed structures. This article describes how this learning study was conducted and discusses reflections made during the process. Furthermore, we discuss how the learning study method could be implemented in technology education using hands-on material. Some of the results point to problems of delimiting an object of learning in technology education using hands-on material and the complexity in the relation between content and context in learning. The results also show benefits from the collaborative method where researchers and teachers work together with regards to specific learning content in the technology classroom.  相似文献   
92.
A quarter of the total increase in emissions is attributable to the growth of emissions per capita, whereas three-quarters are due to population growth. This evidence notwithstanding, demography in climate–economy models typically follows exogenous trends. We develop a climate–economy integrated model with endogenous fertility through a quality–quantity trade-off. The decentralization of the social optimum requires two complementary instruments: a carbon pricing policy and family planning interventions. Global population increases and reaches a peak, depending on the scenario, between 11.6 billion in the social optimum and 14.6 billion if only carbon prices are implemented. Fertility costs (i.e., the net present value of the climate-related costs per child) are in 2020 estimated to be about 22,000 euros in the “social optimum” scenario, and about 88,000 euros in the “second-best with fertility taxes” scenario. Carbon pricing tends to have a rebound effect as it increases population growth leading to higher future emissions. Our results highlight the effects of fertility choices and global population on climate change, quantifying the cost of neglecting the interaction.  相似文献   
93.

One of the most important challenges for social venture entrepreneurs is acquiring resources. Reward crowdfunding is considered a suitable tool for meeting the financing needs of social ventures, whose backers are particularly interested in firm ideas and core values rather than in collaterals or business plans. A strategic factor that is able to influence the outcome of crowdfunding campaigns is the entrepreneurial narrative. Very few scholars have examined the key factors that support a crowdfunding campaign, particularly those on reward-based crowdfunding platforms, and the effects of entrepreneurial narratives on investors’ decisions. Aiming to fill this research gap, this paper investigates how entrepreneurs in the technology industry describe their social ventures and projects on Eppela, an Italian reward-based crowdfunding platform. Thematic analysis was applied to detect the five following key factors of effective entrepreneurial narratives in reward-based crowdfunding campaigns for social ventures: 1) problem/need; 2) project; 3) product; 4) team; and 5) venture. Each key factor includes specific subfactors. Lexical data analysis was then performed to identify the following expected effects of the examined entrepreneurial narratives on potential investors, leading these investors to understand, trust, and approve the project proposal, and thus, finance the social venture’s project: 1) reassurance, 2) reliability, and 3) credibility. Based on these results, this study proposes an explanatory model about how to design effective entrepreneurial narratives to be presented to contribute as much as possible to the success of projects in crowdfunding platforms.

  相似文献   
94.
International Entrepreneurship and Management Journal - The present article investigates entrepreneurial sustainable innovations (ESIs) that work against the five elements (policy, finance, human...  相似文献   
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