Yicong Huang

High-density cities face increasing pressure to curb the rapid growth of building-sector carbon emissions, yet the specific impacts of China’s dual-control policy—regulating both total emissions and emission intensity—remain insufficiently understood. To address this gap, this study aims to quantify how dual-control constraints shape urban building-emission trajectories by developing a dynamic scenario model that integrates both operational and embodied emissions while accounting for technological progress, energy-structure adjustments, and socioeconomic change. The model is applied to Guangzhou, a representative high-density metropolis in China’s low-carbon transition. Three policy scenarios are evaluated: a baseline pathway reflecting existing trends, an energy-conservation pathway emphasizing efficiency improvements, and a deep-decarbonization pathway that combines enhanced efficiency with accelerated clean-energy adoption. The results show that rising residential energy demand is the primary driver of emission growth, whereas technological advancement provides the strongest mitigation potential. Under the energy-conservation scenario, emissions are projected to peak around 2029, consistent with China’s national carbon-peaking target for 2030. Overall, the findings offer clear empirical evidence and actionable policy insights for accelerating urban decarbonization in high-density contexts under dual-control constraints.

The objective of this study is to review and synthesize entrepreneurship in the context of the bottom/base of pyramid (BoP). The concept of the BoP approach, which describes the possibility of profitably in both serving the poor and alleviating poverty, has iterated from 1.0 to 3.0 since 2002. It has transformed from engaging the poor as “customers” (BoP 1.0) to engaging them as “producers” (BoP 3.0). However, although the poor in BoP markets perform as active, central focal actors to identify and create entrepreneurial opportunities, inadequate attention has been paid to the question of how to engage the poor as entrepreneurs. Understanding this question is critical because entrepreneurship has been regarded as an effective tool to relieve poverty. Therefore, this research focuses on three specific questions: (1) What are the characteristics of entrepreneurs in the BoP market? (2) What are the contents of their entrepreneurial activities? and (3) What are the consequences? To answer these questions, this paper conducted a systematic literature review of 56 studies on entrepreneurship at the BoP in the scientific database Web of Science by using PRISMA to guide the review process. From the findings of the three research questions, the study also further identifies four types of entrepreneurs at the BoP (i.e., survival entrepreneurs, community entrepreneurs, professional entrepreneurs, and full entrepreneurs). With a discussion on future directions for these four types of entrepreneurs, this review highlights the heterogenous roles of the poor at the BoP and their challenges to create wealth, which is beneficial for directing the focuses of this topic.