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"ABSTRAKPenelitian ini membahas mengenai pengaruh accrual reversal,yang terdiri darigood accrual dan accrual estimation errorterhadap persistensi laba dan returnsaham. Sampel penelitian adalah perusahaan non keuangan yang terdaftar diBursa Efek Indonesia dengan periode penelitian 2000-2012. Total observasidalam penelitian ini adalah 2.550. Hasil penelitian menunjukkan bahwa accrualestimation error memiliki persistensi lebih rendah dibandingkan good accrual.Penelitian ini tidak menemukan pengaruh komponen akrual terhadap returnsaham.

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ABSTRACTThis paper discusses about the effect of accrual reversal, which consist of goodaccrual reversal and accrual estimation error on earnings persistence and stockreturns. The samples are non financial companies listed on Indonesia StockExchange year 2000-2012. Total observations in this study are 2.550. The resultshows that accrual estimation errors have lower persistence than good accruals.This study find no effect of accrual component on stock returns."

"The Overreaction Hypothesis suggests that extreme movements in stock prices are followed by price movements in the opposite direction as investors realize that they have overreacted, and the greater the initial price movements, the greater the subsequent reversal. One way in which the overreaction hypothesis has been studied is by analyzing the behavior of stock returns following large stock price declines. While there is a preponderance research finding evidence of reversal in short-term after large declines, many of them argued that overreaction effect may be attributed to illiquidity, ex. Bremer & Sweeney (1991) and Cox & Peterson (1994). This research examines short-term overreaction in the sample that consist of stocks listed on LQ 45, which is classified the most liquid market in Indonesia.

The stock returns of every firm listed in the LQ 45 covering the period 2001 to 2007 were compared to specific trigger value, consistent with the prior research, -10%. If on any single day the return was equal to or less than the trigger value, the return was define as an event. For each stock, daily return are then examined both previous and following the event date (t-5 up to t+20), and compared with the stock's expected return, that estimated by mean-adjusted returns model.

The objectives of this study is to investigate security return behavior in the three-day period and also subsequent to three-day period immediately following large declines to determine whether the reversal process persists. The second objective is to investigate whether industry classification plays a different role on the reversal process. The Results of the research tend to support the overreaction hypothesis.

The results from the analysis reveal that, three-day period following the day of the large price declines, the liquid stocks earn positive and statistically significant abnormal returns. These positive and statistically significant abnormal return indicate that much of initial change in the price of these stocks was short-term overreaction. Furthermore, in the longer-term the analysis find that, beginning four days after the drop, securities tend to enter prolonged of relatively poor performance. The results from the analysis of the reversal patterns across industries reveal that magnitude and trend of the observed reversal do not differ substantially among industries."

"Tesis ini membahas mengenai pengaruh stock mispricing terhadap return reversal saham-saham di Bursa Efek Indonesia. Penelitian ini merupakan penelitian kuantitatif dengan menggunakan panel data dari tahun 2006 hingga tahun 2011. Variabel mispricing diukur melalui proksi volatilitas atau standar deviasi dari nilai residual. Terdapat empat variabel dependen di dalam penelitian ini untuk melihat mean reverting saham, yaitu return minggu pertama, return minggu kedua, return minggu ketiga dan return minggu keempat seletah periode mispricing. Hasil dari penelitian ini menyimpulkan bahwa tingkat mispricing suatu saham berpengaruh positif dan signifikan terhadap return reversal. Berdasarkan analisa t-statistic untuk setiap regresi, maka didapatkan hasil bahwa variabel mispricing paling berpengaruh terhadap return reversal saham terhitung pada minggu kedua setelah periode mispricing. Pada minggu ketiga dan keempat setelah periode mispricing, return saham telah mengikuti proses mean reverting, yaitu return berangsurangsur kembali perlahan kepada return semestinya.

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This thesis discusses the effect of mispricing to return reversal stocks in the Indonesia Stock Exchange. This is a quantitative method using panel data from 2006 until 2011. Mispricing variable was measured by the residual volatility (standar deviation) proxy. There are four dependent variables in this study to look at the mean reverting of stocks, which are return on the first week, return on the second week, return on the third week and return on the fourth week after the mispricing period.

This study concludes that the stock mispricing has a positive and significant impact on return reversal. Based on t-statistic analysis for each regression, the most influence effects starts in the second week after mispricing period. In the third and fourth weeks after mispricing period, stock returns have been following the mean reverting process, which gradually return to the supposed return."

"Penelitian ini ingin menguji apakah fenomena market overreaction terjadi pada saham-saham yang mengalami perubahan persentase harga tertinggi, baik positif (terjadi pada saham winners) maupun negatif (terjadi pada saham losers), yang diperdagangkan di Bursa Efek Indonesia selama periode Januari 2007 hingga Desember 2007. Tujuan utama penelitian ini adalah untuk menguji apakah pergerakan harga saham dapat diprediksi setelah mengalami perubahan ekstrem harga. Secara spesifik, apakah terjadi pembalikan harga setelah perubahan ekstrem harga pada sampel yang terdiri dari 246 saham winners dan 246 saham losers. Hasil pengujiannya menunjukkan bukti bahwa telah terjadi overreaction, baik pada saham winners maupun losers. Pembalikan harga ditemukan satu hari setelah peningkatan harga ekstrem dan efeknya bertahan hingga 5 hari untuk saham winners. Dan untuk saham losers, pembalikan harga ditemukan selama 3 hari berturut-turut dan di hari kelima serta efeknya bertahan hingga 10 hari. Analisis regresi menunjukkan bahwa pembalikan harga mempunyai hubungan negatif dengan perubahan harga untuk kedua sampel, dan juga dengan ukuran perusahaan hanya untuk saham losers.

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This paper empirically investigates the market overreaction effect of the stocks with the largest daily percentage increases or decreases in price occurred in Indonesia Stock Exchange between January 2007 and December 2007. The primary objective of this paper is to test whether stock price behavior is predictable following extreme returns. Specifically to test the occurance of price reversals after daily gains or losses in stock returns on samples consist of 246 winners and losers. The results show evidence of stock price overreaction effect for both winners and losers samples. The price reversal effect is found in one day after extreme increase in returns and lasting for 5 days for winners. And for losers, reversal is found within first three days and at fifth day after extreme decrease in returns and lasting for 10 days. Regression analysis shows that the stock price reversal is inversely related to the price gains or losses, and also with firm size but only for losers."

"Penelitian ini bertujuan untuk menganalisis pengaruh atensi investor terhadap return sneakers di pasar sneakers sekunder. Pengujian dilakukan dengan metode analisis regresi data panel atas sejumlah sampel sneakers dengan penjualan tertinggi selama periode Juli sampai dengan Desember 2019. Menggunakan data sneakers yang dikumpulkan secara manual dari situs StockX.com dan Google Search Volume Index (SVI) sebagai proksi atas atensi investor, dapat disimpulkan bahwa peningkatan atensi investor akan meningkatkan return sneakers. Lebih lanjut, hasil penelitian juga membuktikan terjadinya return reversal jangka pendek yang ditandai dengan pengaruh negatif return sneakers pada satu periode sebelumnya terhadap return sneakers di periode berjalan. Menurut teori behavioral finance, return reversal dapat menjadi pertanda bahwa pembentukan harga di pasar dipengaruhi oleh bias perilaku investor.

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This study aims to analyze the impact of investor attention to sneakers return in sneakers resale market. The test was conducted using panel data regression analysis over a number of best-selling sneakers from July through December 2019.

Using sneakers data handcollected from StockX.com website and Google Search Volume Index (SVI) as proxy of investor attention, it is concluded that an increase in investor attention will increase the sneakers return as well. Furthermore, test result also proved the existence of short-term return reversal which is indicated by negative impact of sneakers return in previous period to sneakers return in current period. According to theory in Behavioral Finance, return reversal can be a sign that price in market is affected by investor's behavioral bias."

"Penelitian ini mempelajari mengenai pola transaksi dan kinerja investasi pada saham yang terdaftar dalam pengumuman saham suspend dan saham unsuspend di Bursa Efek Indonesia selama periode 2016-2017 berdasarkan berbagai tipe investor dan juga mengkaji keberadaan price reversal pada periode tersebut. Dengan menggunakan data transaksi harian yang dibagi kedalam beberapa tipe investor lokal dan asing detail, didapatkan hasil bahwa, perilaku herding lebih kuat terjadi pada investor asing dibandingkan dengan investor lokal. Pada kategori tipe investor lokal dan asing detail, tipe investor perusahaan efek lokal memiliki perilaku herding paling kuat pada kedua periode suspensi. Kinerja investasi secara kumulatif investor asing lebih baik daripada investor lokal dan kinerja investasi terbaik didapatkan oleh tipe investor perusahaan efek lokal. Investor lokal memiliki pola investasi information-based model, sedangkan investor asing memiliki pola investasi value investing pada periode sebelum suspend dan information-based model pada periode setelah unsuspend. Untuk tipe investor detail yang memiliki pola investasi behavioral-based model pada kedua periode suspensi adalah investor individual lokal, investor perusahaan asing, dan investor bank asing. Sedangkan untuk pola value investing adalah investor individu asing. Investor asuransi lokal, investor lainnya lokal, dan perusahan efek asing memiliki pola investasi information-based model pada kedua periode suspensi. Berdasarkan analisa uji ANOVA didapatkan bahwa telah terjadi indikasi price reversal pada periode pengumuman sebelum suspend dan setelah unsuspend.

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This research examines trading patterns and performance of stock before and after suspension announcement in Indonesia Stock Exchange during 2016 to 2017 based on investor type and also examines the existence of price reversal. By using the daily transaction data of domestic and foreign investor detail, proved that herding behavior is stronger in foreign investor than domestic investor in both suspension period. Based on detail investor category, securities company domestic investors have the strongest herding in both suspension period. Investment performance of foreign investors are better than domestic investors and the best investment performance are securities domestic investors. Domestic investors have information-based model as an investing pattern, while foreign investor has value investing model in before suspension and information-based model after suspension. For investor type that have behavioral-based model are individual domestic, corporate foreign, and bank foreign investors. Whereas, for value investing model is individual foreign investor. Insurance domestic, other domestic, and securities company foreign investors have information-based model investing pattern in both suspension period. Based on ANOVA analysis showed that there has been a price revesal indication in before suspend announcement and after unsuspend announcement period."

"ABSTRAKVasektomi sudah diterima masyarakat sebagai metode yang mudah dan efektif untuk kontrasepsi pria. Namun, beberapa pasien ingin mengembalikan kesuburan mereka karena kasus perceraian atau pernikahan kembali. Teknik melakukan vasektomi reversal bervariasi dengan kelebihan dan kekurangannya. Salah satu teknik adalah vasektomi reversal mikroskopik double layer. Kami mengevaluasi tingkat keberhasilan teknik ini didasarkan pad analisis semen. Tingkat keberhasilan baik yaitu sekitar 98,5 pasien dengan tindak lanjut lengkap memiliki sperma berdasarkan analisis sperma. Namun, total keberhasilan tindak lanjut sangat rendah 5 dari 19 pasien meskipun biaya vasektomi reversal cukup mahal sekitar 3.000 USD . Tingkat lost follow up pada vasektomi reversal adalah sekitar 20 .

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ABSTRACTVasectomy already been accepted by the society as easy and effective method formale contraceptive. However, some patients want to restore their fertility status due to divorce or re marriage cases. Techniques in performing vasectomy revUrologiersal are varying with their own advantages and disadvantages. One of the techniques is double layer microscopy vasectomy reversal. We evaluate the success rate of this technique based on the semen analysis. The success rate was good with around 98.5 patients with complete follow up had sperm in their semen analysis However, total success of follow up were very low 5 out of 19 patients even though the cost of reversal vasectomy was quite expensive around 3.000 USD . Lost to follow up rate of reversal vasectomy was around 20 ."

"Grup merupakan suatu struktur aljabar berupa himpunan takkosong yang apabila didefinisikan suatu operasi biner harus memenuhi 4 sifat yaitu: tertutup, berlaku aturan asosiatif, terdapat elemen identitas, serta tiap elemen memiliki elemen invers. Graf Cayley merupakan graf yang berupa representasi elemen-elemen suatu grup sebagai simpul-simpul di graf serta keberadaan busur ditentukan oleh suatu subhimpunan pembangkit dari grup yang tidak mengandung elemen identitas grup. Pada penelitian ini dibahas beberapa jenis graf Cayley yang dibentuk dari grup simetri dengan subhimpunan pembangkit berupa transposisi dan reversal, ditunjukkan pula konstruksinya, serta sifat-sifat dasar yang terkait graf Cayley yang dibentuk dengan tujuan untuk memberikan gambaran tentang graf Cayley dari grup simetri.

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Group is an algebraic structure which is a non-empty set in which a binary operation is defined. The group and its elements need to have four properties that are closed under the operation, associative, having identity element, and each element has its own inverse. Cayley graph is a graph representing elements of a group as nodes and the existence of edges connecting the nodes is determined by a identity-free generating subset of the group. In this research, some families of Cayley graphs on symmetric group whose generating sets consists of transpositions and reversal are presented. The contructions and basic properties of such graphs are presented to help giving the idea about Cayley graph on symmetric group."