Judul: Analisis Perbandingan Sistem Pajak di Indonesia dengan Australia dalam Perspektif Ekonomi Politik
Abstrak: Tax plays an important role as a source to finance the development of the country, although if the tax ratio and the number of individual taxpayers in Indonesia are compared with other countries, the tax revenue in Indonesia is not optimal yet. This research aims to know about factor that can increase the number of individual taxpayers in Indonesia comparison to Australia. Furthermore the connection between tax system, democracy, and rent-seeking activity; also the effect to tax revenue are analysed. The method is Panel Data Analysis in 15 countries of G-20 include Indonesia and Australia. Data used in this research are tax revenue as percentage of GDP, Democracy Index, Paying Taxes Ranking, and International Country Risk Guide (ICRG) Index from 2008 until 2011. The best model is Fixed Effect Model with cross section weights and white cross section. The estimation shows that a good tax system, full democracies, and the absent of rent-seeking have a significant and positive effect to tax revenue.
Keyword: Panel Data, Rent-Seeking, Democracy, Tax system

Judul: Keterkaitan antara Pertumbuhan Ekonomi dan Perpajakan Indonesia
Abstrak: Tax has an important role in the economy as a source of goverment revenue, and fiscal intsrument. However, tax can also reduce efficiency in economic activity. The tax to GDP ratio of Indonesia is still low at a level of 12% in average over the last fifteen years. Nevertheless, economic growth relatively shows good performance with an average about 6% since the last ten years. Theres is needed a research because in previous studies about taxation and economic growth in several countries showed different on results. This study will analyze connection between taxation and economic growth of Indonesia. Secondary data were used from period 1980-2013 with variable of GDP, and the details of tax revenue. By means of VAR analysis result, concluded that there is uni directional relationship between the economy and taxation in Indonesia, which is the economic growth affects taxation.
Keyword: VAR, tax revenue, tax ratio, Economic growth

Judul: Natrium lignosulfonat sebagai agen pendispersi pada mortar
Abstrak: Lignosulphonate, a modification product of lignin waste from pulp and paper industry can be used as water reducer in mortar mixture. This substance can influence the mechanical characteristic of mortar such as diameter of flow, flexural strength, compressive strength, and setting time of cement paste. Lignosulphonate shows it function as dispersant on cement hydration at 3 days that analyzed with x-ray difractometer. Research result show that flow of fresh mortar rise with increase concentration (from weight of cement) of synthetic sodium lignosulphonate (NaLS). It show that mortar homogenity also increasing. The result of flexural strength and compressive strength test use synthetic NaLS 0.1-0.3% from weight of cement show that addition synthetic NaLS 0.2% is the best result because it has the biggest of flexural strenght and compressive strength value. Initial setting time of cement paste increase, about 50% with addition of synthetic NaLS 0.2%. Whereas the final setting time decrease, about 8%. Cement hydration test show increase hydration product peak, Ca(OH)2 dan calcium silicate hydrate (C-S-H).
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