%V 5 %P 1355-1365 %N 1 %X This paper provides the results of analysis of total, sectoral-specific, and spatial-specific multipliers and flow-on effects in Sumatera Island economy. The model employed was Inter-Regional Input-Output Model (IRIOM) developed using new hybrid procedures with special attention on Island economy. Data used for model were updated Indonesian data for the year of 2015. The results show that firstly, the important sectors of Sumatra Island economy could be based on total multipliers and flow-on effects of output, income and employment. Secondly, important economic sectors could be based on sector-specific multipliers effects; multipliers that occurred in own sector and other sectors. Thirdly, important economic sectors could be based on spatialspecific multipliers; multipliers that occurred both in own region and other regions. Fourthly, important economic sectors could be based on spatial distribution of flow-on; flow-on effects that occurred in own region as well as in other regions. %A Muchdie Muchdie %T SPATIAL DIMENSIONS OF MULTIPLIERS IN SUMATRA ISLAND ECONOMY: AN INTER-REGIONAL INPUT-OUTPUT ANALYSIS %D 2017 %L repository154 %J International Journal of Advanced Research (IJAR)