RT - Journal Article T1 - Investigating the factors affecting the income of municipalities and providing appropriate strategies for sustainable revenue JF - Geographical-Researches YR - 2018 JO - Geographical-Researches VO - 33 IS - 2 UR - http://georesearch.ir/article-1-240-en.html SP - 73 EP - 89 K1 - Sustainable Income K1 - Fuzzy Logic K1 - Unsustainable Sources K1 - Municipal System K1 - Karaj Municipality AB - Introduction and Background: Establishing a systematic and authoritative structure will make a sustainable income for municipalities. Aims: In order to optimize the sources of revenue structure for municipalities, the study of the income structure of metropolitan municipalities can be used as a guide and a good pattern for reforming and compiling an optimal income structure. The important point is the proportionality of the municipality's duty and revenue. Basically, the services of the municipalities are due to specific features cannot be directly provided by the private sector. Based on this, the combination of municipality’s income seems necessary. Methodology: In this research, a large picture of the sources of income and expenses of municipalities is first presented, and then, in the specific view of the characteristics of the city of Karaj, a favorable framework is proposed for the sustainable income system of Karaj Municipality, which is consistent with the goals of sustainable development. In this research, a questionnaire has been used in order to achieve sustainable earnings resources, based on fuzzy logic. Then, the income is divided into two categories: sustainable and unsustainable. Conclusion: The fuzzy results show that the sources of income of gas, telephone, electricity, and customer charges; taxes on value added; taxes on the production or sale of manufactured goods; the contribution of the municipality to the collection of provisions; the passport duties; the consequences of driving offenses; the complications of the management of the test drive are more sustainable than other sources of income. LA eng UL http://georesearch.ir/article-1-240-en.html M3 10.29252/geores.33.2.73 ER -