The estimated non-monetary resources required for the experiment are:  A common activity area: The experiment was conducted at the outdoor yard of A5 apartment building, Nai Hien Dong ward, Son Tra district, Da Nang city.  An event organizer and a coordinator: The experiment was coordinated by DISED and UNDP, with the support of the local authorities and the participation of various organizations related to charity or environment.  Communication channels and materials: The experiment used various communication methods such as Facebook, banners, posters, flyers, bracelets, paper bags, etc. to promote the event and raise awareness about circular economy and sharing economy.  A registration system for stalls: The experiment required the participants to register for stalls in advance via online forms or phone calls.  A measurement system for the results: The experiment used various measurement methods such as counting the number of buyers and sellers, conducting surveys, interviewing, observing, etc. to collect and analyze data on the outcomes of the event. 

The experiment proposed a model for scaling up the sharing market to other locations and contexts, based on the results and lessons learned from the policy experiment. The model suggested four steps: (1) identifying potential areas and partners; (2) designing and testing the sharing market according to the local characteristics and needs; (3) evaluating and adjusting the model based on the feedback and data; and (4) replicating and expanding the model to other areas and partners. The experiment also recommended some criteria for selecting suitable areas and partners, such as the level of awareness, participation, and demand for sharing old goods, the availability of infrastructure and resources, and the support and cooperation of the local authorities and stakeholders. 

The experiment did not require iterations, as it was designed as a quasi-experimental design with two groups: one with the intervention (the second market) and one without (the first market). However, some adjustments were made during the implementation of the experiment, such as changing the location of the second market to a more convenient and accessible place, and adding more activities and services to the market, such as a workshop on repairing and upcycling old goods, and a free drink station for the participants. 

Some advice for someone wanting to replicate this experimental activity are:  Conduct a thorough analysis of the local context and needs before designing and testing the sharing market and involve the local authorities and stakeholders in the process.  Use a mixed-methods approach for data collection and analysis, and triangulate the findings from various sources and methods, such as surveys, interviews, observations, and focus groups.  Provide clear and consistent communication and information about the purpose and benefits of the sharing market and use various channels and formats to reach and attract the target audience.  Create a friendly and lively atmosphere for the sharing market, and provide incentives, feedback, and recognition for the participants, such as vouchers, certificates, or badges.  Integrate the sharing market with other activities and services related to the circular economy, such as workshops, exhibitions, or consultations, and create opportunities for interaction and connection among the participants and with the organizers. 

This experiment could be replicated in another thematic area or other SDGs, if the following factors are considered:  The relevance and suitability of the sharing market for the specific theme or goal, and the potential impact and benefits of the sharing market for the target group and the wider society.  The availability and accessibility of the old goods or resources that could be shared, reused, or recycled, and the quality and safety of the goods or resources.  The legal and regulatory framework and the cultural and social norms and values that could affect the sharing market and the behavior of the participants.  The capacity and willingness of the local authorities and stakeholders to support and cooperate with the sharing market, and the level of awareness and participation of the potential participants. 

experiment by helping the researchers to identify the problem, the context, the assumptions, and the hypotheses related to the circular economy and the sharing behavior of the citizens of Da Nang.  The “sense” phase involved conducting in-depth interviews with some individuals to understand their perspectives and preferences on sharing and consuming used goods, as well as reviewing the existing literature and policies on the circular economy.  The “explore” phase involved designing and implementing the policy experiment of organizing two sharing markets for used goods, with different levels of involvement from the local authorities, and measuring the outcomes and impacts of the intervention.  In hindsight, the researchers would have done differently with their fellow Solution Mapper and Explorer by:  Engaging more stakeholders: They would have involved more representatives from the private sector, civil society, and the media to increase the awareness and participation of the public in the sharing markets.  Expanding the scope and scale: They would have extended the duration and frequency of the sharing markets, the number and diversity of the locations and participants, to test the model's sustainability and scalability.  Enhancing the data collection and analysis: They would have improved the quality and quantity of the data collected from the sharing markets, such as using digital tools and platforms, and applied more rigorous and robust methods of data analysis, such as using randomized controlled trials or quasi-experimental designs. 

The high demand and enthusiasm for the sharing markets: They found that many people were interested and willing to join the sharing markets, either as sellers or buyers, and expressed their satisfaction and appreciation for the initiative.  The positive spillover effects and impacts of the sharing markets: They observed that the sharing markets not only reduced the waste generation and increased the resource efficiency, but also fostered the social cohesion and community empowerment among the participants.