Judul: Technical inefficiency, technological stagnation, and total factor productivity in medium and large-scaled manufacturing industiy: a stochastic production frontier approach
Abstrak: Penelitian ini bertujuan untuk mempelajari kemampuan produksi, kemajuan teknologi, efisiensi teknis dan sumber-sumber pertumbuhan usaha menegah dan usaha besar dengan menggunakan konsep stochastic production jUnction. Secara khusus tujuan penelitian ini: (I) menganalisis keragaan industri manufaktur Indonesia yang mencakup aspek produksi, elastisitas input dan skala usaha, (2) menganalisis perubahan teknologi dan dampaknya terhadap penggunaan faktor produksi, (3) menganalisis tingkat inefisiensi teknis dan faktor-faktor penyebab inefisiensi teknis, dan (4) menganalisls pertumbuhan total factor produktivitas industri manufuktur usaha menengah dan usaha besar. Model pendugaan fungsi produksi menggunakan translog stochastic production frontier dengan menggunakan faktor produksi tenaga keIja, kapital, bahan baku dan teknologi yang diproksi dengan variabel waktu. Penghitungan elatisitas output terhadap faktor produksi, skala usaha, perubahan teknologi, inefisiensi teknis dan pertumbuhan total faktor produktivitas mengikuti model inefisiensi dalam kondisi time varying inefisiensi teknis dengan menggunakan pool data (cross section 6 sektor industri dan time series tahun 1997-2002. Model diestimasi dengan metode maximum likelihood estimation dengan pendugaan Technical Efficiency Effect Model(TE-Effect Model).
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Judul: Measuring manufacturing firms efficiency: Evidence from East Java province, Indonesia
Abstrak: Examining the technical efficiency of the manufacturing industry in Indonesia is important to develop this sector and enhance Indonesia’s economy. To measure the technical efficiency, a true fixed effect stochastic frontier model with heteroscedasticity in the idiosyncratic error and technical inefficiency component is implemented. Using the firm-level data of Large and Medium Industries (LMIs) in East Java province, Indonesia from 2017-2019, it is found that the overall technical efficiency is 0.79 with a minimum value of 0.24 and a maximum value of 0.99, indicating the potency to increase technical efficiency. Moreover, it is found that the transportation equipment industry is the most improved sector in terms of technical efficiency while the pharmaceutical and drug industry shows the highest declining trend in technical efficiency. The furniture product manufacture, garment industry, chemical product manufacture, and computer, electronic and optical product industry also experience considerably downward trend of technical efficiency.
Keyword: heterosedasticity, industry, stochastic frontier, technical efficiency

Judul: Posisi Filogenetik Kura-Kura Carettochelys Insculpta  (Reptillia: Testudinata)
Abstrak: Carettochelys insculpta is an endemic freshwater turtle of southern Papua and northern Australia. Phylogenetic position of this turtle is remain unresolved until now. Most of the research conducted show close relationships of C. insculpta and members of Trionychidae family. However, some of the research show distance between C. insculpta and members of Trionychidae family. This research is conducted to analyze phylogenetic relationship between C. insculpta and other members of Testudinata using 12S rRNA, 16S rRNA, and both gene as markers. DNA samples were obtained from three different organisms of C. insculpta. Two species used as outgroups were Alligator mississippiensis and Iguana iguana. Phylogenetic analysis was carried out using Neighbor-Joining method with Felsenstein 1981 (F81) modeltest. A polytomy tree of Testudinata was produced by using 12S rRNA gene. However, analysis using 16S rRNA and both genes as markers confirmed that C. insculpta was located between the Chelonidae and the Trionychidae family.
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