Main Article Content

Abstract

Purpose – This study examines the influence of zakat fund distribution on the productive behavior patterns of mustahiks in Indonesia, involving the moderating role of financial literacy. This study additionally examines the alterations in the behavior patterns of mustahiks following the receipt of zakat fund assistance.
Methodology – This study employed a sequential explanatory mixed-methods design to examine the behavioral impacts of zakat distribution. In the quantitative phase, survey data were collected from 109 purposively selected mustahiks, using Likert-type items. The data were analyzed through Partial Least Squares Structural Equation Modeling (PLS-SEM) to estimate the effects of Zakat distribution on both productive and consumptive behavior, while also testing the moderating role of financial literacy.
Findings – The results show that the variable of zakat fund distribution has a positive and significant effect on the productive and consumptive behavior of mustahik. The interplay of Sharia financial literacy as a moderating component can affect the connection between zakat fund distribution.
Implications – The results of this research can be used as a reference for zakat institutions to monitor the impact of zakat fund distribution on beneficiaries and understand the factors influencing it.
Originality – This research contributes to the existing literature by providing concrete evidence regarding the impact of zakat fund distribution on the behavior patterns of mustahiks, whether they receive productive or consumptive zakat. Additionally, there is an examination of the role of financial literacy, which acts as a factor that can strengthen or weaken that relationship.

Keywords

Distribution of zakat financial literacy productive behavior Consumer behavior

Article Details

How to Cite
Asya’bani, N., Afifa, U. N., Widiastuti, T. ., Mawardi, I., & Soleh, M. (2025). Analysis of the impact of zakat fund distribution on mustahik productivity in Indonesia. Review of Islamic Social Finance and Entrepreneurship, 4(2), 177–195. https://doi.org/10.20885/RISFE.vol4.iss2.art7

References

  1. Afifah, F. Z., & Permana, M. Y. G. (2024). Peran distribusi zakat produktif terhadap peningkatan kesejahteraan mustahik kampung zakat terpadu Jember. Al-Mabsut Jurnal Studi Islam Dan Sosial, 18(2), 173–190. https://doi.org/10.56997/almabsutjurnalstudiislamdansosial.v18i2.1442 DOI: https://doi.org/10.56997/almabsutjurnalstudiislamdansosial.v18i2.1442
  2. Afriansyah, D. (2020). Pengaruh pendayagunaan zakat produktif terhadap pemberdayaan mustahiq (Studi pada Badan Amil Zakat Jawa Timur). Jurnal Ekonomika dan Bisnis Islam, 3(1), 97–103. https://journal.unesa.ac.id/index.php/jei/article/view/26475
  3. Ahmed, H., & Salleh, A. M. H. A. P. M. (2016). Inclusive Islamic financial planning: A conceptual framework. International Journal of Islamic and Middle Eastern Finance and Management, 9(2), 170–189. https://doi.org/10.1108/IMEFM-01-2015-0006 DOI: https://doi.org/10.1108/IMEFM-01-2015-0006
  4. Akmar binti Ismail, I., & Nasri bin Hussain, M. (2017). Productive zakat distribution by zakat institutions in Malaysia. International Journal of Academic Research in Business and Social Sciences, 7(3), 554. https://doi.org/10.6007/IJARBSS/v7-i3/2758
  5. Amalia, E., Rodoni, A., & Tahliani, H. (2018). Good governance in strengthening the performance of zakat institutions in Indonesia. KnE Social Sciences, 223-241. https://doi.org/10.18502/kss.v3i8.2511 DOI: https://doi.org/10.18502/kss.v3i8.2511
  6. Amsari, S., & Nasution, S. (2020). Benefits of productive zakat in increasing mustahik revenue in Lazismu Center. Proceeding International Seminar of Islamic Studies, 1(1), 141–150. https://jurnal.umsu.ac.id/index.php/insis/article/view/4079
  7. Ananda, S., Kumar, R. P., & Dalwai, T. (2024). Impact of financial literacy on savings behavior: The moderation role of risk aversion and financial confidence. Journal of Financial Services Marketing, 29(3), 843–854. https://doi.org/10.1057/s41264-023-00265-1 DOI: https://doi.org/10.1057/s41264-023-00265-1
  8. Annisa, A., Ratumbuysang, M. F. N. G., Rizky, M., & Nor, B. (2023). The effects of lifestyle and financial literacy on student consumptive behavior (Case study of students of the Department of Social Sciences, Faculty of Teacher Training and Education, University of Lambung Mangkurat Banjarmasin). Diversity, Jurnal Ilmiah Pascasarjana, 3(1). https://doi.org/10.32832/djip-uika.v3i1.10085 DOI: https://doi.org/10.32832/djip-uika.v3i1.10085
  9. Ashari, A., Fatwati, S. R., Hasanah, S., Juwairiyah, S., Rudi, R., & Utama, A. P. (2023). BAZNAS contribution through productive zakat program to the economy poor society. Majapahit Journal of Islamic Finance and Management, 3(1), 1-14. https://doi.org/10.31538/mjifm.v3i1.30 DOI: https://doi.org/10.31538/mjifm.v3i1.30
  10. Azhar, M. F., Gustiawati, S., & Hamdani, I. (2022). Pengaruh penyaluran dana zakat produktif terhadap peningkatan usaha mikro. El-Mal Jurnal Kajian Ekonomi & Bisnis Islam, 3(3), 599–607. https://doi.org/10.47467/elmal.v3i3.946 DOI: https://doi.org/10.47467/elmal.v3i3.946
  11. Azizah, W. N., & Muhari, S. (2023). The impact comparison of consumptive zakat distribution and productive zakat empowerment: A case study from Baznas South Tangerang. in Indonesian Conference of Zakat-Proceedings (203-211).https://www.iconzbaznas.com/submission/index.php/proceedings/article/view/686/253
  12. Badan Amil Zakat Nasional. (2024). Laporan pengelolalaa zakat nasional akhir tahun 2024. Badan Amil Zakat Nasional. https://baznas.go.id/assets/images/szn/LPZ%20Nasional%20Akhir%20Tahun%202024.pdf
  13. Beik, I. S., & Arsyianti, L. D. (2015). Construction of CIBEST model as measurement of poverty and welfare indices from Islamic perspective. Al-Iqtishad: Jurnal Ilmu Ekonomi Syariah, 7(1), 87–104. https://doi.org/10.15408/aiq.v7i1.1361 DOI: https://doi.org/10.15408/aiq.v7i1.1361
  14. Creswell, J. W., & Plano Clark, V. L. (2018). Designing and conducting mixed methods research. SAGE.
  15. Febriandika, N. R., & Rohmah, F. A. (2024). The standard for allocating zakat social funds as an operational expense of nonprofit organizations in Indonesia, Sudan and Algeria. Milkiyah Jurnal Hukum Ekonomi Syariah, 3(1), 31–42. https://doi.org/10.46870/milkiyah.v3i1.788 DOI: https://doi.org/10.46870/milkiyah.v3i1.788
  16. Fornell, C., & Larcker, D. F. (1981). Evaluating structural equation models with unobservable variables and measurement error. Journal of Marketing Research, 18(1), 39-50. https://doi.org/10.2307/3151312 DOI: https://doi.org/10.1177/002224378101800104
  17. Gunata, M., Syaifudin, N., & Hendrian, H. (2024). The influence of financial literacy, self-control, and the social environment on consumptive behavior in urban communities in the banyumas regency area. Syntax Literate Jurnal Ilmiah Indonesia, 9(5), 3141–3155. https://doi.org/10.36418/syntax-literate.v9i5.15359 DOI: https://doi.org/10.36418/syntax-literate.v9i5.15359
  18. Hair, J. F., Black, W. C., Babin, B. J., & Anderson, R. E. (2010). Multivariate data analysis (7th ed.). Prentice Hall.
  19. Hair, J. F., Hult, G. T. M., Rungle, C. M., Sartstedt, M., & Danks, N. (2022). A primer on partial least squares structural equation modeling (PLS-SEM) (3rd ed.). SAGE. DOI: https://doi.org/10.1007/978-3-030-80519-7
  20. Hambali, R., Arsa, A., & Zahara, A. E. (2022). Pengaruh literasi keuangan terhadap perilaku konsumtif masyarakat desa Majelis Hidayah, kecamatan Kuala Jambi, Kabupaten Tanjung Jabung Timur. AL ITMAMIY: Jurnal Hukum Ekonomi Syariah, 4(2), 01–10. https://ejurnalqarnain.stisnq.ac.id DOI: https://doi.org/10.55606/ai.v4i2.42
  21. Hapsari, M. I., Mahmud, A. H., Herianingrum, S., Fauzy, R. M. Q., Ngayesah, S., Hamid, A., Ekonomi, F., & Masfiyah, L. M. (2023). Antecedents of Islamic welfare: Productivity, education, and the financial aspect. International Journal of Islamic and Middle Eastern Finance and Management, 17(1), 63-85. https://doi.org/10.1108/IMEFM-07-2022-0299 DOI: https://doi.org/10.1108/IMEFM-07-2022-0299
  22. Henseler, J., & Chin, W. W. (2010). A comparison of approaches for the analysis of interaction effects between latent variables using partial least squares path modeling. Structural Equation Modeling, 17(1), 82–109. https://doi.org/10.1080/10705510903439003 DOI: https://doi.org/10.1080/10705510903439003
  23. Henseler, J., Ringle, C. M., & Sarstedt, M. (2015). A new criterion for assessing discriminant validity in variance-based structural equation modeling. Journal of the Academy of Marketing Science, 43(1), 115–135. https://doi.org/10.1007/s11747-014-0403-8 DOI: https://doi.org/10.1007/s11747-014-0403-8
  24. Herianingrum, S., Supriani, I., Sukmana, R., Effendie, E., Widiastuti, T., Fauzi, Q., & Shofawati, A. (2023). Zakat as an instrument of poverty reduction in Indonesia. Journal of Islamic Accounting and Business Research, 15(4), 643–660. https://doi.org/10.1108/jiabr-11-2021-0307 DOI: https://doi.org/10.1108/JIABR-11-2021-0307
  25. Hernawati, N., Maemunah, M., & Kuntorini, R. S. (2022, April). Effectiveness zakat operational risk management on the pandemic era of Covid 19. In 4th Social and Humanities Research Symposium (SoRes 2021) (pp. 196-199). Atlantis Press.https://doi.org/10.2991/assehr.k.220407.037 DOI: https://doi.org/10.2991/assehr.k.220407.037
  26. Hidayat, M. R. (2023). Evaluation of the productive zakat program effectiveness with CIBEST model. International Journal of Zakat, 8(1), 1–15. https://doi.org/10.37706/ijaz.v8i1.365
  27. Ismail, I., Majid, M. S. A., Marliyah, R. H., & Handayani, R. (2022). Productive zakat as a financial instrument in economic empowerment in Indonesia: A literature study. International Journal of Economic, Business, Accounting, Agriculture Management and Sharia Administration (IJEBAS), 2(1), 83-92. https://pdfs.semanticscholar.org/30de/f9271a1c43540a88d4931c8b1dfee88d8564.pdf DOI: https://doi.org/10.54443/ijebas.v2i1.122
  28. Juliani, J. (2020). Dampak penyaluran zakat produktif terhadap pemberdayaan ekonomi mustahik (Kajian pada lembaga keuangan mikro Syariah Baitul Mal Aceh). Tadabbur: Jurnal Peradaban Islam, 2(2), 312–332. https://doi.org/10.22373/tadabbur.v2i2.25 DOI: https://doi.org/10.22373/tadabbur.v2i2.25
  29. Karunia, S. O. F., & Amir, F. (2024). Productive zakat distribution in improving mustahik welfare: CIBEST model approach. Journal of Enterprise and Development, 6(2), 290–299. https://doi.org/10.20414/jed.v6i2.9723 DOI: https://doi.org/10.20414/jed.v6i2.9723
  30. Khairi, S. N. M., Malik, N. M. A. N. A., & Wahid, H. (2024). Factors influencing the payment of income zakat and zakat al-Fitr beyond the obligatory amount. International Journal of Research and Innovation in Social Science, 8(15), 151–163. https://doi.org/10.47772/IJRISS.2024.815EC0012 DOI: https://doi.org/10.47772/IJRISS.2024.815EC0012
  31. Kholis, N., & Mugiyati. (2021). Distribution of productive zakat for reducing urban poverty in Indonesia. International Journal of Innovation, Creativity and Change, 1–12. https://doi.org/10.53333/ijicc2013/15303 DOI: https://doi.org/10.53333/IJICC2013/15303
  32. Kline, R. B. (2016). Principles and practice of structural equation modeling (4th ed.). The Guilford Press.
  33. Lutfi, B. A., & Fathoni, M. R. (2023). Productive and consumptive zakat among the mustahik-owned super-micro businesses during the Covid-19 pandemic period: A qualitative approach. J-EBIS (Jurnal Ekonomi dan Bisnis Islam), 345–368. https://doi.org/10.32505/j-ebis.v8i2.5991 DOI: https://doi.org/10.32505/j-ebis.v8i2.5991
  34. Mafluhah, M. (2024). Peran zakat produktif dalam pemberdayaan ekonomi mustahik. JES (Jurnal Ekonomi Syariah), 9(2), 99–116. https://doi.org/10.30736/jes.v9i2.882 DOI: https://doi.org/10.30736/jes.v9i2.882
  35. Mawardi, I., Widiastuti, T., al Mustofa, M. U., & Hakimi, F. (2023a). Analyzing the impact of productive zakat on the welfare of zakat recipients. Journal of Islamic Accounting and Business Research, 14(1), 118–140. https://doi.org/10.1108/JIABR-05-2021-0145 DOI: https://doi.org/10.1108/JIABR-05-2021-0145
  36. Miranda, M., Nurjanah, N., & Pospos. A.F. FW (2024). Pengaruh literasi keuangan, locus of control dan sikap keuangan terhadap perilaku konsumtif mahasiswa. Jii (Jurnal Investasi Islam), 9(1), 36–52. https://doi.org/10.32505/jii.v9i1.8826 DOI: https://doi.org/10.32505/jii.v9i1.8826
  37. Mubtadi, N. A., & Susilowati, D. (2018). Analysis of governance and efficiency on zakat distribution: Evidence from Indonesia. International Journal of Zakat, 3(2), 2018–2019. DOI: https://doi.org/10.37706/ijaz.v3i2.74
  38. Mustafa, M. H. (2022). Reactualization of criteria of wealth in Islam as a condition for paying Zakat Maal. Al-Bayyinah, 6(1), 22-33. https://doi.org/10.35673/al-bayyinah.v6i1.2639 DOI: https://doi.org/10.35673/al-bayyinah.v6i1.2639
  39. Mutlu, Ü., & Özer, G. (2021). The moderator effect of financial literacy on the relationship between locus of control and financial behavior. Kybernetes, 51(3), 1114–1126. https://doi.org/10.1108/k-01-2021-0062 DOI: https://doi.org/10.1108/K-01-2021-0062
  40. Nafiah, L. (2015). Pengaruh pendayagunaan zakat produktif terhadap kesejahteraan mustahiq pada program ternak bergulir Baznas Kabupaten Gresik. EL-Qist, 05(01), 929–942. DOI: https://doi.org/10.15642/elqist.2015.5.1.929-942
  41. Najmudin, N., Syihabudin, S., Fatoni, A., & Sujai, S. (2022). Utilization of productive zakat and its effect on empowerment of Small Micro Business (SMEs) in Serang Regency. Al Qalam, 38(2), 251. https://doi.org/10.32678/alqalam.v38i2.4749 DOI: https://doi.org/10.32678/alqalam.v38i2.4749
  42. Nashir, S. A., & Nurzaman, M. S. (2019). The impact of zakat empowerment program on village. In Proceedings of the International Conference of Ethics on Business, Economics, and Social Science (ICEBESS 2018). Atlantis Press. https://doi.org/10.2991/icebess-18.2019.22 DOI: https://doi.org/10.2991/icebess-18.2019.22
  43. Nasution, A., Siregar, T. R. S., Rahman, H., & Putra, H. K. (2023). The role of Sharia compliance, good corporate governance, competence on SUMUT zakat management. Jurnal Ekonomi Syariah, 8(2), 126–136. https://doi.org/10.37058/jes.v8i2.8451 DOI: https://doi.org/10.37058/jes.v8i2.8451
  44. Nasution, M. I., & Prayogi, M. A. (2019). The utilization of zakah productive towards micro-business growth and mustahik welfare. Jurnal Ekonomi Pembangunan: Kajian Masalah Ekonomi Dan Pembangunan, 20(1), 1–11. https://doi.org/10.23917/jep.v20i1.6576 DOI: https://doi.org/10.23917/jep.v20i1.6576
  45. Nauli, M., Batubara, S., & Batubara, D. (2022). Performance analysis of BAZNAS Tapanuli Selatan district. Journal of Islamic Social Finance Management, 3(2), 193–203. https://doi.org/10.24952/jisfim.v3i2.6309 DOI: https://doi.org/10.24952/jisfim.v3i2.6309
  46. Nisa, A., & HS, S. (2023). Mustahiq economic empowerment model through productive zakat as business capital. In ICIFEB 2022: Proceedings of the 3rd International Conference of Islamic Finance and Business, ICIFEB 2022, 19-20 July 2022, Jakarta, Indonesia (p. 1). European Alliance for Innovation. https://doi.org/10.4108/eai.19-7-2022.2328201 DOI: https://doi.org/10.4108/eai.19-7-2022.2328201
  47. Noviarita, H., Indahsari, L., & Chalid, M. H. A. (2024). Islamic philanthropy literacy in improving welfare and sustainable economic growth in Lampung Province. KnE Social Sciences, 460-470. https://doi.org/10.18502/kss.v9i12.15873 DOI: https://doi.org/10.18502/kss.v9i12.15873
  48. Nurkartikasari, R., Muljaningsih, S., & Ekawaty, M. (2023). Analysis effect of productive zakat on the welfare mustahiq through development of micro (A case study at Badan Amil Zakat (BAZNAS), Yatim Mandiri, and LAZIS-NU Tulungagung in East Java). Journal of International Conference Proceedings. https://doi.org/10.32535/jicp.v6i1.2301 DOI: https://doi.org/10.32535/jicp.v6i1.2301
  49. Putra, P., Tirtajaya, M. D., & Pratama, W. H. C. (2020). The effect of productive zakah on increasing mustahiq revenue and profit. In Proceedings of the 1st International Conference on Recent Innovations (ICRI 2018) (pp. 2120-2133). https://doi.org/10.5220/0009939921202133 DOI: https://doi.org/10.5220/0009939921202133
  50. Rachmawati, N., & Nuryana, I. (2020). Peran literasi keuangan dalam memediasi pengaruh sikap keuangan dan teman sebaya terhadap perilaku pengelolaan keuangan. Economic Education Analysis Journal, 9(1), 166–181. https://journal.unnes.ac.id/sju/eeaj/article/view/37246/15346
  51. Ramadhan, V., Setiawan, D., & Misdawita, M. (2023). Peranan dana zakat produktif terhadap perkembangan usaha mikro mustahik melalui program riau makmur pada baznas provinsi Riau (Studi kasus kota Pekanbaru). Jurnal Ilmiah Ekonomi Islam, 9(3), 3697. https://doi.org/10.29040/jiei.v9i3.9795 DOI: https://doi.org/10.29040/jiei.v9i3.9795
  52. Razak, S. H. A. (2020). Zakat and waqf as instrument of Islamic wealth in poverty alleviation and redistribution: Case of Malaysia. International Journal of Sociology and Social Policy, 40(3–4), 249– 266. https://doi.org/10.1108/IJSSP-11-2018-0208 DOI: https://doi.org/10.1108/IJSSP-11-2018-0208
  53. Ryandono, M. N. H., & Nanda, A. S. (2020). The transformation of mustahiq as productive zakat recipients in Surabaya. Journal of Economic Cooperation and Development, 41(3), 1-14. https://jecd.sesric.org/pdf.php?file=ART18040603-2.pdf
  54. Sabila, H., & Saptutyningsih, E. (2020). Islamic philanthropy empowerment fund in social economic affairs. Journal of Economics Research and Social Sciences, 4(1). https://doi.org/10.18196/jerss.040115 DOI: https://doi.org/10.18196/jerss.040115
  55. Saedi, S., Chotib, M., & Masrohatin, S. (2024). Analysis of the impact of productive zakat in empowering mustahiq’s economic welfare in Jember Regency. Jurnal Syntax Admiration, 5(3), 973–983. https://doi.org/10.46799/jsa.v5i3.1076 DOI: https://doi.org/10.46799/jsa.v5i3.1076
  56. Sayinzoga, A., Bulte, E., & Lensink, R. (2015). Financial literacy and financial behaviour: Experimental evidence from rural Rwanda. The Economic Journal, 126(594), 1571–1599. https://doi.org/10.1111/ecoj.12217 DOI: https://doi.org/10.1111/ecoj.12217
  57. Sholika, S., & Zaki, A. (2024). Understanding the complexity of investment behavior: A qualitative study. Indonesian Interdisciplinary Journal of Sharia Economics (IIJSE), 7(2), 4111-4120. https://doi.org/10.31538/iijse.v7i2.5186
  58. Siregar, F. N. Z., Syahbudi, M., & Nasution, M. L. I. (2024). The Impact of zakat utilization and business financing on welfare with business sustainability as a moderating variable (Case study of BAZNAS Labuhanbatu Utara). Jurnal Ilmiah Mizani Wacana Hukum Ekonomi Dan Keagamaan, 11(2), 363. https://doi.org/10.29300/mzn.v11i2.4444 DOI: https://doi.org/10.29300/mzn.v11i2.4444
  59. Situmorang, E. (2024). Financial literacy consumptive the effect of financial literacy on consumptive behaviour. Isc-Beam, 1(1), 753–766. https://doi.org/10.21009/isc-beam.011.53 DOI: https://doi.org/10.21009/ISC-BEAM.011.53
  60. Suriani, S., Riyaldi, M. H., Nurdin, R., Fadliansah, O., & Wintara, H. (2021). Zakat and sustainable development: Effect of zakat and macroeconomic variables on dependency ratio and poverty. 2021 International Conference on Decision Aid Sciences and Application (DASA), 392–396. https://doi.org/10.1109/DASA53625.2021.9682377 DOI: https://doi.org/10.1109/DASA53625.2021.9682377
  61. Tenriwaru, T., Said, M. A., & Budiandriani. (2022). Management accountability of zakat and its role to empower creative economy. International Journal of Religious and Cultural Studies, 4(2). https://doi.org/10.34199/ijracs.2022.10.07 DOI: https://doi.org/10.34199/ijracs.2022.10.07
  62. Urif, U. Z., Herwanti, T., & Huzaini, M. (2018). Perilaku mustahiq dalam memanfaatkan dana zakat perspektif ekonomi Islam. IQTISHADIA Jurnal Ekonomi & Perbankan Syariah, 5(1), 84–109. https://doi.org/10.19105/iqtishadia.v5i1.1649 DOI: https://doi.org/10.19105/iqtishadia.v5i1.1649
  63. Uyuni, B., & Adnan, M. (2023). Improving financial literacy and zakat fund management in Majelis Taklim: An action plan. Indonesian Conference of Zakat-Proceedings. https://iconzbaznas.com/submission/index.php/proceedings/article/view/687%0Ahttps://iconzbaznas.com/submission/index.php/proceedings/article/download/687/254
  64. Widiastuti, T., Auwalin, I., Rani, L. N., & Ubaidillah Al Mustofa, M. (2021). A mediating effect of business growth on zakat empowerment program and mustahiq’s welfare. Cogent Business and Management, 8(1). https://doi.org/10.1080/23311975.2021.1882039 DOI: https://doi.org/10.1080/23311975.2021.1882039
  65. Widiastuti, T., Cahyono, E. F., Zulaikha, S., Mawardi, I., & al Mustofa, M. U. (2021). Optimizing zakat governance in East Java using analytical network process (ANP): The role of zakat technology (ZakaTech). Journal of Islamic Accounting and Business Research, 12(3), 301–319. https://doi.org/10.1108/JIABR-09-2020-0307 DOI: https://doi.org/10.1108/JIABR-09-2020-0307
  66. Yutegi, A. (2024). Pengaruh peranan zakat produktif terhadap pemberdayaan ekonomi mustahiq studi kasus Baznas kota Tangerang Selatan. Maro: Jurnal Ekonomi Syariah dan Bisnis, 7(2), 243-256. https://doi.org/10.31949/maro.v7i2.11486 DOI: https://doi.org/10.31949/maro.v7i2.11486
  67. Zaenal, M. H., Astuti, A. D., & Sadariyah, A. S. (2018). Increasing urban community empowerment through changing of poverty rate index on the productive zakat impact. IOP Conference Series: Earth and Environmental Science, 106(1). https://doi.org/10.1088/1755-1315/106/1/012104 DOI: https://doi.org/10.1088/1755-1315/106/1/012104

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