Judul: Analysis of the Determinants Stock Performance on Cosmetics and Household Company in Indonesia Stock Exchange
Abstrak: Sub sektor kosmetik dan keperluan rumah tangga (household) merupakan salah satu sektor yang memiliki peranan penting terhadap perekonomian karena menjadi salah satu dari 10 sektor yang menjadi prioritas pada Rencana Induk Pembangunan Industri Nasional (RIPIN) Kementerian Perindustrian tahun 2015-2035. Sektor kosmetik memiliki rata-rata pertumbuhan asset dan penjualan yang cukup konsisten pada tahun 2016 hingga 2023 dengan peningkatan rata-rata tertinggi sebesar 4,88%, namun terjadi penurunan pada tahun 2020 hingga 2021 sebesar 3,21% dikarenakan efek Pandemi Covid-19. Penelitian ini bertujuan untuk mempelajari faktor yang berpengaruh terhadap kinerja saham sub sektor kosmetik dan keperluan rumah tangga. Dampak pandemi covid-19 terhadap kinerja perusahaan dianalisis menggunakan uji beda dengan membandingkan kondisi sebelum dan selama pandemi. Selanjutnya, dilakukan analisis regresi data panel untuk mempelajari faktor apa saja yang berpengaruh terhadap kinerja saham dan melihat perbedaan kondisi kinerja perusahaan pada masa sebelum dan sesaat pandemi covid-19. Berdasarkan hasil uji beda, ditemukan adanya penurunan kinerja perusahaan selama pandemi covid-19 yang terlihat dari turunnya tingkat profitabilitas (ROA) selama pandemi dibandingkan dengan periode sebelum pandemi, adanya peningkatan dari sisi solvabilitas perusahaan (DER) untuk menutupi kenaikan beban operasional perusahaan serta kenaikan volume transaksi saham sub sektor kosmetik selama periode pandemi dengan sebelum pandemi covid-19. Hasil analisis regresi data panel menunjukkan bahwa faktor internal perusahaan yang meliputi ROA, DER serta rasio pasar yaitu volume transaksi (trading volume activity) berpengaruh signifikan terhadap kinerja saham sub sektor kosmetik. Namun, pertumbuhan penjualan tidak berpengaruh signifikan terhadap kinerja saham sub sektor kosmetik., The Cosmetics and Household Goods Sub sector is one sector that has an important role in the economy because it is one of the 10 priority sectors in the Nasional Industrial Development Master Plan (RIPIN) of the Ministry of Industry for 2015-2035. The Cosmetics sector had a fairly consistent average growth in assets and sales from 2016-2019 with the highest average increase of 4.88%, however, there was a decline from 2020 to 2021 of 3.21% due to the effect of the COVID-19 Pandemic. This research aims to study the factors that influence stock prices in the cosmetics and household goods sub-sector. The impact of the COVID-19 pandemic on company performance was analyzed using a difference test by comparing conditions before and during the pandemic. This research aims to study the factors that influence stock performance in the cosmetics and household goods sub-sector. The impact of the COVID-19 pandemic on company performance was analyzed using a difference test by comparing conditions before and during the pandemic. Next, panel data regression analysis was carried out to study what factors influence stock performance and see differences in company performance conditions before and immediately after the COVID-19 pandemic. Based on the results of different test, it was found that there was a decline in company performance during the COVID-19 pandemic, which can be seen from the decline in the level of profitability (ROA) during the pandemic compared to the pre-pandemic period, an increase in company solvency (DER) to cover the increase in company operational expenses and an increase in volume. Stock transactions in the cosmetics sub-sector during the pandemic period and before the COVID-19 pandemic. The result of the panel
Keyword: Capital Market, Cosmetics and Household Sub-sectors, Internal Factors, Stock Performance

Judul: Financial Performance Before and During Covid and Its Effect on Stock Returns in Telecommunication Companies on the Indonesia Stock Exchange.
Abstrak: Pandemi Covid-19 turut melemahkan perekonomian Indonesia. Perusahaan dituntut bekerja efektif agar bertahan di kondisi yang volatil. Pengukuran kinerja keuangan menjadi dasar evaluasi apakah perusahaan bekerja efisien memanfaatkan modal serta menghasilkan nilai tambah bagi para pemegang sahamnya. Penelitian ini bertujuan menganalisis perbedaan kinerja keuangan perusahaan sebelum dan saat Covid menggunakan metode economic value added dan market value added serta menganalisis pengaruhnya terhadap return saham. Pengambilan sampel mengunakan metode purposive sampling dan diperoleh empat perusahaan subsektor telekomunikasi selama 2017-2022. Teknik analisis data menggunakan analisis statistik deskriptif, uji beda, dan analisis data panel dengan regresi linear berganda. Hasil penelitian mendeteksi perbedaan MVA yang turun signifikan daripada nilai sebelum Covid, EVA saat Covid mengalami kenaikan daripada sebelum Covid namun tidak signifikan. Hasil analisis regresi data panel menunjukkan bahwa EVA dan MVA tidak memiliki pengaruh signifikan terhadap return saham., The Covid-19 pandemic has weakened the Indonesian economy. Companies are expected to work effectively to survive in volatile conditions. Financial performance measurement becomes the basis for evaluating whether the company has worked efficiently in utilizing capital and generating added value for shareholders. This study aimed to analyze the differences in company's financial performance before and during Covid using the economic value added and market value added methods and to analyze their effect on stock returns. Sampling used a purposive sampling method and obtained four telecommunication subsector companies during 2017-2022. The data analysis technique used descriptive statistical analysis, difference test, and panel data analysis method with multiple linear regression. The results detected differences in MVA which dropped significantly from the value before Covid, EVA during Covid increased than before Covid but was not significant. The results of panel data regression analysis showed that EVA and MVA have no significant effect on stock returns.
Keyword: Covid, EVA, kinerja keuangan, MVA, return saham

Judul: Tree berdiameter lima adalah graceful
Abstrak: This manuscript presents some proofs that every tree of diameter five is graceful. A graceful tree is a graph which has a graceful labelling. This labelling assigns absolute difference of connected vertices, such that the resulting edge labels are mutually distinct. There are three theorems to be considered. First theorem proves that every tree of diameter four is graceful. Second theorem proves that every tree of diameter five is graceful or nearly graceful. The third theorem improves the second theorem and shows that every tree of diameter five is nearly graceful, which can be transformed into graceful using some certain patterns.
Keyword: Graf, Pelabelan graceful, Bogor Agricultural University, Institut Pertanian Bogor, IPB