Specific primary and secondary sources collected that accurately define the hypothesis define the hypothesis. Relevant communication from related authorities in the form of letters or emails under the topic of the informal sector in economic development of the local area

- Primary source: Interviews with individuals working in the informal sector in the local area, such as street vendors, artisans, and domestic workers.

- Secondary source: Academic studies and research reports on the economic impact of the informal sector in the local area.
- Letters or emails from government officials or policymakers discussing strategies for supporting and regulating the informal sector to promote economic development.

These sources would help to accurately define the hypothesis that the informal sector plays a significant role in the economic development of the local area.