Judul: Analisis Volatilitas Harga Minyak Sawit dan Harga Minyak Goreng
Abstrak: Crude palm oil industry has bright prospect in vegetables oil competition. Nowadays crude palm oil is the most produced and consumed.. Indonesia is the biggest crude palm oil exporter contributing 46.2 percent of world’s total supply in 2011. One of palm oil based downstream industry which is important in Indonesia is cooking oil industry. Cooking oil is one of the important nine basic needs for people. Cooking oil consumption tends to increase and this condition has been fullfiled by domestic industry. This because Indonesia has surplus condition in cooking oil. Unfortunately this surplus condition doesnot guarantee low and stable price domestically. The aims of this research are to analyze volatility of crude palm oil price and cooking oil, to analyze effect of crude palm oil export policy to the volatility of palm oil price and cooking oil and to analyze effect of value added tax borne by government to the cooking oil volatility. Data used in this research is secondary data which is daily time series data, period January 2005 to March 2012. Volatility of palm oil price and cooking oil in this research is built on the basis of time series econometric methods called autoregressive conditional heteroscedasticity/ generalized autoregressive conditional eteroschedasticity (ARCH GARCH) Analysis results to price volatility of crude palm oil and cooking oil show different pattern. Volatility of crude palm oil is influenced by volatility of two previous periods, meanwhile volatility of cooking oil is influenced by volatility and variance last period. Volatility of cooking oil price is higher than volatility of cooking oil. Analysis results to progressive export tax policy of crude palm oil and value added tax borne by government towards cooking oil industry give different effect to price volatility. Implementation of Export tax policy to crude palm oil leads to constant price volatility of crude palm oil and cooking palm oil price until the end of analysis period, with the result that export tax policy can stabilize crude palm oil price and cooking oil. On the other hand value added tax borne by government towards cooking oil price leads to unstable price volatility of cooking oil until the end of analysis period. It can be concluded that value added tax borne by government cannot stabilize of cooking oil price
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Judul: Dampak pajak ekspor crude palm oil terhadap industri minyak goreng indonesia
Abstrak: Oil palm industry has a very important role to perform in development of Indonesian national economy. These commodities, and specifically Crude Palm Oil (CPO), have contributed immensely to the Gross Domestic Product (GDP) of Indonesia, increased international and national trade, created various forms of employment, led to growth in production and areal development, and improved the living standards as well as the financial status of the local people. Indonesia is one of the highest CPO producers in the world. The world CPO production has grown steadily and relatively faster as compared to other oil yielding crops. Export growth of Indonesian CPO can be attributed to three factors: world demand factor, product and market effects and competitiveness effects. The world demand factor reflects growth in exports that can be attributed to rising international demand, i.e. the stronger global import demand, the stronger the country’s export growth. Due to the importance of the crude palm oil to the Indonesian economy, and the world over, the Indonesian government decided to impose export tax on its CPO. Therefore, the goal of the research is to find out the impact of the CPO export tax on Indonesian cooking oil industry. The findings of the study show that export tax had been proven to be effective in controlling domestic cooking oil price, which otherwise would provide the supply more of the raw material for domestic cooking oil. With this policy, the government had been successful to keep the cooking oil price down when the world CPO price increased. The implementation of tax policy should be considered to improve the competitiveness of Indonesian CPO in the world market, and allocate the government revenue to develop the supply side of Indonesian oil palm industry. There should be an increase in investment to improve the oil palm productivity.
Keyword: Crude Palm Oil, Export Tax, Cooking Oil

Judul: Closed Knight’s Tour pada Papan Catur Berbentuk Persegi Panjang dengan Ukuran Maksimal 8 × 8
Abstrak: Closed Knight’s Tour merupakan langkah kuda yang mengunjungi setiap kotak pada papan catur tepat satu kali dengan langkah kuda berawal dan berakhir pada kotak yang sama. Graf yang terbentuk dari closed knight’s tour dinotasikan sebagai graf G(m,n), dengan m adalah banyaknya baris dan n adalah banyaknya kolom. Graf tersebut memuat Hamiltonian cycle. Sebuah graf terhubung G adalah graf bipartite jika dan hanya jika graf tersebut tidak memiliki cycle dengan panjang ganjil. Papan catur yang memenuhi syarat cukup untuk memiliki closed knight’s tour adalah papan catur berukuran 5 × 6, 5 × 8, 6 × 6, 6 × 7, 6 × 8, 7 × 8, dan 8 × 8.
Keyword: bipartite, closed knight’s tour, hamiltonian cycle, knight’s tour, teori graf