Judul: Analisis Total Factor Productivity (Tfp) Tanaman Perkebunan Di Indonesia Periode 1990-2010
Abstrak: Tujuan penelitian ini adalah untuk menganalis Total Factor Productivity (TFP) tanaman perkebunan di Indonesia periode 1990-2010 dengan menggunakan Indeks Tornqvist-Theil. Selain itu untuk melihat pengaruh input produksi terhadap output produksi tanaman perkebunan di Indonesia, metode yang digunakan adalah OLS (Ordinary Least Square) dengan model fungsi Cobb-Douglass. Hasil penelitian menunjukan bahwa Indeks TFP pada tanaman perkebunan di Indonesia periode 1990-2010 bernilai positif. Hal ini menandakan bahwa penggunaan input dan output dapat dihasilkan secara maksimal. Hasil estimasi dari fungsi Cobb- Douglass untuk melihat pengaruh input terhadap output produksi menunjukan bahwa seluruh penggunaan input seperti kapital, tenaga kerja, dan luas panen berpengaruh secara positif dan signifikan terhadap output produksi.
Keyword: Indeks Tornqvist-Theil, Tanaman perkebunan Indonesia, Total Factor Productivity.

Judul: Faktor-faktor yang Memengaruhi Total Factor Productivity Industri Pertanian Indonesia Periode 1981-2010
Abstrak: Industry has a big role in Indonesia’s economy as the main driver of development, which it gives the largest contribution to the Gross National Product (GNP). Indonesia is an agrarian country which has a big potency in developing agriculture products because of the abundant resources it has, supporting climate, and fertile soil. This study aims to analyze Total Factor Productivity (TFP) of Indonesia’s agriculture industry through a Cobb-Douglas production function approach and analyze factors influencing it using Error Correction Model (ECM), along with a descriptive method to explain an overview of agriculture industry in Indonesia. Time series data are used for period 1980-2010. The estimation result shows that variables significantly influencing TFP are Gross National Product, domestic investment, export of industry output (X), and investment import (M).
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Judul: Studi Taksonomi Katak Subgenus Papurana (Lesson, 1831) dari Halmahera (Anura, Ranidae, Hylarana), Studi Taksonomi Katak Subgenus Papurana (Lesson, 1831) dari Halmahera (Anura, Ranidae, Hylarana
Abstrak: I reevaluated taxonomic of subgenus Papurana position from Halmahera based on morphological and molecular analyses. My results show that two separate species occur on the Halmahera Island, each nested within two distinct clades (hereafter papua clade and celebensis clade), one of which corresponds to H. moluccana (celebensis clade) and the other to an unidentified species (papua clade). By p-distance ranging from 6.9 to 11.5% on the 16S rRNA gene, the unidentified species (Hylarana sp.) is genetically different from all congeners of the papua clade. The Hylarana sp. can be distinguished from all congeners by following combination of charactes: vomer teeth in two oblique rows with narrow inter-vomer distance; snout rounded dorsally; dorsum with few scattered cone-shaped tubercles that are black with white tips; distinct skin folds (ridges) on the dorsal side of the thigh coinciding with dark brown cross bars; a marbled pattern on the ventral side of the thigh and yellowish groin. I also present new data for H. daemeli, H. volkerjane, and H. arfaki from the western region of Papua. Furthermore, I found that H. celebensis has numerous mtDNA lineages, indicating cryptic diversity within the celebensis clade. The discovery of two separate species on Halmahera necessitates more research into the biogeographic history of Hylarana in Northern Moluccas.
Keyword: frog, Halmahera, Hylarana, morphology, Papurana, phylogenetic