Judul: Estimation of Indonesia's Printing and Writing Paper Export Demand Function
Abstrak: Permintaan printing and writing paper dunia terus menurun dengan berkembangnya teknologi informasi. Walaupun permintaan dunia berkurang, printing and writing paper masih menjadi produk ekspor kertas utama Indonesia. Penelitian ini bertujuan untuk mengestimasi fungsi permintaan ekspor printing and writing paper Indonesia. Estimasi dilakukan dengan teknik Panel data analysis menggunakan data dari 30 negara tujuan ekspor untuk periode tahun 2009—2019. Tiga model data panel diinvestigasi: pooled, fixed effect, dan random effect; dan kemudian dibandingkan dengan menggunakan uji Chow, Breusch-Pagan, dan Hausman. Hasil estimasi awal menunjukkan adanya autokorelasi dan heteroskedastisitas. Koreksi berhasil dilakukan untuk model pooled dan fixed effect, tetapi model random effect masih memiliki autokorelasi. Hasil uji Chow dan Breusch-Pagan menolak pooled sebagai model yang lebih baik. Hasil uji Hausman menunjukkan model fixed effect adalah model terbaik dengan elastisitas harga sebesar -0.94 dan elastisitas pendapatan sebesar 1.09 serta nilai R2 sebesar 0.96., Demand for printing and writing paper in the world is decreasing as information technology grows. Despite a decrease in world’s demand, the printing and writing paper is still the primary paper export products of Indonesia. This study aims to estimate Indonesia’s printing and writing paper export demand function. Estimation was done using panel data analysis technique with data from 30 export partner countries for the period 2009—2019. Three panel data models were investigated: pooled, fixed effect, and random effect models; and then compared using Chow, Breusch-Pagan, and Hausman tests. Results detected heteroscedasticity and autocorrelation. After correction, pooled and fixed effect models were suitable, but random effect model still had autocorrelation. Chow and Breusch-Pagan tests rejected pooled model as the best model. Hausman test indicated fixed effect model was the best model with price elasticity of -0.94, income elasticity of 1.09, and R2 value of 0.96.
Keyword: panel data, fixed effect model, random effect model, pooled model, paper products

Judul: Export Performance of Indonesia’s  Paper Product in Period 2009-2020
Abstrak: Indonesia berada pada posisi kesembilan sebagai negara eksportir utama kertas dunia pada tahun 2019. Hal ini menunjukkan permintaan kertas Indonesia yang tinggi dipasar dunia. Oleh karena itu, kebijakan strategis untuk pengembangan industri kertas dalam menghadapi berbagai situasi ekonomi dunia di masa depan sangat diperlukan. Penelitian ini bertujuan untuk menganalisis kinerja ekspor kertas Indonesia pada periode 2009-2019, yaitu periode setelah krisis finansial dunia 2007-2008 dan sebelum pandemi Covid-19; dan periode 2019-2020, yaitu periode pandemi Covid-19. Kinerja ekspor dianalisis dengan menggunakan metode Constant Market Share (CMS). Hasil penelitian menunjukkan kinerja industri kertas Indonesia ini sangat baik dibandingkan rata-rata kinerja ekpor kertas dunia yang menurun 1,9% per tahun pada periode sebelum pandemi dan menurun 9,9% per tahun pada masa pandemi. Faktor efek pertumbuhan standar dan komposisi komoditas selalu bernilai negatif sepanjang periode penelitian. Faktor efek distribusi pasar dan daya saing selalu bernilai positif dalam periode yang sama., Indonesia is in the ninth position as the world's main paper exporter in 2019. This shows the high demand for Indonesian paper in the world market. Therefore, a strategic policy for the development of the paper industry in the face of various future world economic situations is urgently needed. This study aims to analyze the performance of Indonesia's paper exports in the 2009-2019 period, namely the period after the 2007-2008 world financial crisis and before the Covid-19 pandemic; and the 2019-2020 period, namely the Covid-19 pandemic period. Export performance was analyzed using the Constant Market Share (CMS) method. The result show that the export performance of Indonesia paper industry was very good compare with average of world paper exports, which were declined by 1.9% and 9.9% for the same period, respectively. The effect of standard growth and commodity composition factor are always negative throughout the study period. The effect of market distribution and competitiveness factor are always positive in the same period.
Keyword: Constant Market Share, Covid-19, ekspor kertas, kinerja industri kertas, paper’s export, paper industry  performance

Judul: Hydrothermal Synthesis of Biphasic Calcium Posphate
Abstrak: Biphasio calsium phosphate (BCP), which was a mixture of hydroxypatite (HA) and tricalcium phosphate (TCP), was synthesized by hydrothermal method followed by sintering process. Hydroxyapatite was produced by using natural calcium source CaO from hen's eggshell and (NH4)2HPO4 as phosphate souce, other hydroxyapatite sample was produce by using synthetic calcium source Ca(OH) and H3PO4 as phosphate source.
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