scholarly journals Influence of outliers on some multiple imputation methods

2010 ◽  
Vol 7 (1) ◽  
Author(s):  
Claudio Quintano ◽  
Rosalia Castellano ◽  
Antonella Rocca
Keyword(s):  
Missing Data ◽  
Multiple Imputation ◽  
Strong Influence ◽  
Survey Design ◽  
Small And Medium Enterprises ◽  
Imputation Methods ◽  
Annual Survey ◽  
Before And After ◽  
Design Characteristics ◽  
Medium Enterprises

In the field of data quality, imputation is the most used method for handling missing data. The performance of imputation techniques is influenced by various factors, especially when data represent only a sample of population, for example the survey design characteristics. In this paper, we compare the results of different multiple imputation methods in terms of final estimates when outliers occur in a dataset. Consequently, in order to evaluate the influence of outliers on the performance of these methods, the procedure is applied before and after that we have identified and removed them. For this purpose, missing data were simulated on data coming from sample ISTAT annual survey on Small and Medium Enterprises. MAR mechanism is assumed for missing data. The methods are based on the multiple imputation through the Markov Chain Monte Carlo (MCMC), the propensity score and the mixture models. The results highlight the strong influence of data characteristics on final estimates.

scholarly journals The Effectiveness of Technical Guidance for Entrepreneurs in Small and Medium Enterprises in Facing Halal Certification

2020 ◽  
Vol 2 (2) ◽  
pp. 46-49
Author(s):  
Siska Siska ◽  
Hanifah Rahmi ◽  
Almawati Situmorang
Keyword(s):  
Small And Medium Enterprises ◽  
Market Demand ◽  
Certification Process ◽  
Guarantee System ◽  
Assurance System ◽  
Before And After ◽  
Post Test ◽  
The Difference ◽  
Medium Enterprises ◽  
Technical Guidance

Indonesia is the largest Muslim population country in the world, so the market demand for halal products is enormous. However, in fact, there are not many business actors who submit and have halal certificates, especially in small and medium enterprises. This problem can be due to lack of information and sufficient understanding to apply for a halal certificate. The aim of the research is to give technical guidance for preparing halal certification process. The manual method is used to provide training on the halal guarantee system for the preparation of the halal assurance system (HAS). The workshop began with a pre-test and then the presentation of halal assurance system material, the guidance on how to prepare and discussion. All the activities were done by online (WhatsApp group and zoom meeting). The training ended with the post-test to assess the improvement of knowledge of the. To analyze the difference, we used a paired T-test statistical method. The result of this research shows an increasing understanding of participants (p<0,05) through the comparison between before and after training. These activities conclude that the practice of technical guidance for facing halal certification is beneficial for small and medium enterprises in improving knowledge and capability of the halal certification process.

A practical comparison of single and multiple imputation methods to handle complex missing data in air quality datasets

2014 ◽  
Vol 134 ◽  
pp. 23-33 ◽  
Author(s):  
M.P. Gómez-Carracedo ◽  
J.M. Andrade ◽  
P. López-Mahía ◽  
S. Muniategui ◽  
D. Prada
Keyword(s):  
Air Quality ◽  
Missing Data ◽  
Multiple Imputation ◽  
Imputation Methods

scholarly journals Analisis Penerapan Pajak Penghasilan Usaha Mikro Kecil dan Menengah

2019 ◽  
Vol 2 (1) ◽  
pp. 11-19
Author(s):  
Barita Sormin ◽  
Syamsuri Rahim
Keyword(s):  
Small And Medium Enterprises ◽  
Descriptive Analysis ◽  
Income Taxes ◽  
The Other ◽  
Analysis Method ◽  
Indonesian Government ◽  
Interactive Model ◽  
Model Research ◽  
Before And After ◽  
Medium Enterprises

This research aimed to: (1) To obtain and analyse application of Indonesian Government Act No. 23 of 2018 about increasing level of Micro Small and Medium Enterprises taxpayers who apply in South Makassar and North Makassar Tax Office, (2) to obtain and analyse application of Indonesian Government Act No. 23 of 2018 about contributed Micro Small and Medium Enterprises income taxes related to collection of income taxes Article 4 Section 2 in South Makassar and North Makassar Tax Office. Analysis method used in this research is descriptive analysis to describe increasing number of taxpayers before and after after application of Government Act No.23 of 2018 about collection of income taxes Article 4 Section 2. This research used descriptive analysis method with interactive model. Research shown that: (1) in South Makassar Tax Office, after application of Government Act No.23, shown increasing number of Micro Small and Medium Enterprises taxpayers for 79,61%, in the other hand, in North Makassar Tax Office, after application of Government Act No.23, shown decreasing number of Micro Small and Medium Enterprises taxpayers for -2,44%. (2) in South Makassar Tax Office, average collection of income taxes Article 4 Section 2, after 6 months since applying Government Act No. 23 of 2018, is 10,49% with the low criteria, and in North Makassar Tax Office, average collection of income taxes Article 4 Section 2, after 6 months since applying Government Act No. 23 of 2018, is 17,85% with the low criteria. In the future, government especially South Makassar and North Makassar Tax Office needs to be active and keen for holding personal socialization to the taxpayers.

scholarly journals Best Practices for Addressing Missing Data through Multiple Imputation

2021 ◽  
Author(s):  
Adrienne D. Woods ◽  
Pamela Davis-Kean ◽  
Max Andrew Halvorson ◽  
Kevin Michael King ◽  
Jessica A. R. Logan ◽  
...  
Keyword(s):  
Missing Data ◽  
Best Practices ◽  
Multiple Imputation ◽  
Statistical Techniques ◽  
Parameter Estimates ◽  
Developmental Research ◽  
Imputation Methods ◽  
Listwise Deletion ◽  
Highly Effective ◽  
Practical Guidelines

A common challenge in developmental research is the amount of incomplete and missing data that occurs from respondents failing to complete tasks or questionnaires, as well as from disengaging from the study (i.e., attrition). This missingness can lead to biases in parameter estimates and, hence, in the interpretation of findings. These biases can be addressed through statistical techniques that adjust for missing data, such as multiple imputation. Although this technique is highly effective, it has not been widely adopted by developmental scientists given barriers such as lack of training or misconceptions about imputation methods and instead utilizing default methods within software like listwise deletion. This manuscript is intended to provide practical guidelines for developmental researchers to follow when examining their data for missingness, making decisions about how to handle that missingness, and reporting the extent of missing data biases and specific multiple imputation procedures in publications.

scholarly journals Kenaikan Omzet UMKM Makanan dan Minuman di Kota Bogor Pasca Sertifikasi Halal

Al-Muzara ah ◽  
2020 ◽  
Vol 8 (2) ◽  
pp. 109-127
Author(s):  
Hana Khairunnisa ◽  
Deni Lubis ◽  
Qoriatul Hasanah
Keyword(s):  
Small And Medium Enterprises ◽  
Descriptive Analysis ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Work Hours ◽  
Added Value ◽  
Total Revenue ◽  
Food And Beverage ◽  
Before And After ◽  
Medium Enterprises

Halal certification is one of the company’s strategy that aims to retain their consumers and become a difference with competitors and to give added value for product. Most of the researchers have proved that halal certificates affect big companies’ total revenue. However, there are not many studies that have proved that halal certificate would affect the total revenue of micro, small, and medium enterprises (MSMEs), especially in Bogor City. This research aims to determine the characteristics of MSMEs’ owners and their business, analyze the changes of MSME’s total revenue before and after owning a halal certificate, and the factors that affect MSMEs’ total revenue after owning a halal certificate. The questionnaire data were collected through an interview with 40 food and beverage MSMEs’ owners who have halal certificates in Bogor City. This research uses descriptive analysis, paired sample t-test, and multiple linear regression analysis as the analysis methods. Results based on this research showed that there was a difference in the total revenue of MSMEs before and after owning a halal certificate. The factors that have positive and significant effects of MSMEs’ total revenue influences are capital, work hours, length of business, and a dummy of promotion.

scholarly journals Forced Bank Mergers and SME Financing

2015 ◽  
Vol 1 (8) ◽  
pp. 30-36
Author(s):  
Ishak Ramli
Keyword(s):  
Central Bank ◽  
Small And Medium Enterprises ◽  
Financial Data ◽  
Bank Performance ◽  
Bank Mergers ◽  
Access To Finance ◽  
Before And After ◽  
Survival And Growth ◽  
Medium Enterprises ◽  
Sme Financing

Access to finance is one of the most significant challenges for the creation, survival and growth of small and medium enterprises (SMEs), especially, innovative ones. However, forced bank mergers by Central bank of Indonesia may hurdle SME financing and growth. Using the financial data of seven Indonesian bank mergers within 2004-2009, periods three years before and after the merger, this study examines whether bank mergers may hurdle SME financing and growth. The study concludes that bank mergers in Indonesia decreased SME crediting but increased bank performance and SME crediting no longer influenced bank performance either. Bank mergers hurdle SME financing and growth.

scholarly journals Factors That Influence Small Business Performance in One- Way Traffic System Area

2019 ◽  
Author(s):  
Dyah Ayu Paramita ◽  
Adil Fadillah
Keyword(s):  
Human Resources ◽  
Positive Affect ◽  
Social Economic ◽  
Small And Medium Enterprises ◽  
Before And After ◽  
Medium Enterprises ◽  
Aspect Social ◽  
Operational Aspect ◽  
Policy Aspect ◽  
Financial Aspect

This research aims to determine the factors that affect performance of micro, smalland medium enterprises in Malabar, Lodaya and Gunung Gede before and after theimplementation of one way system. There are several internal and external factors thatinfluence the perfomance of micro, small and medium enterprises.This research usedindependen variables (human resources aspect, financial aspect, technical and operationalaspect, market and marketing aspect, goverment policy aspect, Social, Economic and culturalaspect) and variable dependen (performance of micro, small and medium enterprises).The sampling method that used in this research is nonprobability with 100 respondents thathave macro, small and medium enterprises in Malabar, Lodaya and Gunung Gede.Based on this research, obtained the conclusion that there are two factors that have positiveaffect and significant toward micro, small and medium enterprises before the implementationof one way system. The factors are financial aspect and market, marketing aspect earned tcountthat bigger than t-table. Financial aspect (3,536&gt;1,98), market and marketing aspect(5,402&gt;1,98). And there are four factors that have positive affect and significant towardmacro, small and medium enterprises after the implementation one way system. The factorsare human resources aspect (2,082&gt;1,98), financial aspect (3,287&gt;1,98), technical andoperational aspect (2,081&gt;1,98), and market, marketing aspect (3,712&gt;1,98).This research also got result that there are positive affect and significant from humanresources aspect, financial aspect, technical and operational aspect, market and marketingaspect, goverment policy aspect, Social, Economic and cultural aspect together towardperformance micro, small and medium enterprises before and after the implementation ofone way system because it got f-count that bigger than t-table before the implementation ofone way system it earned (18,446&gt;2,20) and after the implementation of one way system(13,605&gt;2,20).Keywords : human resources aspect, financial aspect, technical and operational aspect,market and marketing aspect, goverment policy aspect, Social, Economic and cultural aspectand performance of micro, small and medium enterprises.

scholarly journals MODEL ARISAN MODAL USAHA DALAM MENDUKUNG KEBERLANJUTAN PENGUSAHA KECIL DI PASAR UNIT II KABUPATEN TULANG BAWANG LAMPUNG

2018 ◽  
Vol 14 (2) ◽  
pp. 171-181
Author(s):  
Amarul Amarul ◽  
Achmad Hatta
Keyword(s):  
Comparative Analysis ◽  
Small And Medium Enterprises ◽  
Business Continuity ◽  
Comparative Approach ◽  
Research Methodologies ◽  
Rate Of Development ◽  
Specific Hypothesis ◽  
Before And After ◽  
Medium Enterprises ◽  
The Relationship

This study aims to analyze the business capital arisan model for small and medium entrepreneurs and the rate of development of small and medium enterprises in Pasar Unit II Kabupaten Tulang Bawang Lampung. The approach used in this study is to use a comparative approach, Ie research methodologies that attempt to quantify the data, and usually apply certain statistical analyzes. The process of collecting data by using questionnaires as a means of collecting data. Then tested the specific hypothesis to know either the relationship or influence significance. By comparative analysis or comparison, it is obtained the result of different test of business continuity before and after follow the arisan. This shows that arisan activities are very helpful as additional capital in the sustainability of their business. Penelitian ini bertujuan untuk menganalisis penerapan model arisan modal usaha bagi pengusaha kecil menegah dan laju perkembangan usaha kecil menengah di Pasar Unit II  Kabupaten Tulang Bawang Lampung. Pendekatan yang digunakan dalam penelitian ini adalah dengan menggunakan pendekatan komparatif, yaitu metodologi riset yang berupaya untuk mengkuantifikasi data, dan biasanya menerapkan analisis statistik tertentu. Proses pengumpulan data dengan menggunakan kuesioner sebagai alat pengumpul datanya.  Kemudian dilakukan pengujian hipotesis secara spesifik untuk mengetahui baik hubungan atau pengaruh signifikansinya. Dengan analisis komparatif atau perbandingan maka diperoleh hasil analisis uji beda keberlanjutan usaha sebelum dan sesudah mengikuti arisan terdapat perbedaan yang signifikan keberlanjutan usaha sebelum dan setelah mengikuti arisan. Ini menunjukkan bahwa kegiatan arisan sangat membantu sebagai tambahan modal dalam keberlanjutan usahanya.

scholarly journals The importance of record keeping to the growth of small and medium scale enterprises (SMEs) in Zimbabwe

2015 ◽  
Vol 12 (4) ◽  
pp. 744-754 ◽  
Author(s):  
Ongayi Vongai Wadesango
Keyword(s):  
Financial Reporting ◽  
Financial Management ◽  
Survey Design ◽  
Small And Medium Enterprises ◽  
Management Skills ◽  
Social Scientists ◽  
Accounting Systems ◽  
Record Keeping ◽  
Medium Enterprises ◽  
Descriptive Survey

This study sought to investigate the influence quality financial reporting systems have on the performance of small and medium enterprises. Descriptive survey design was employed. The sample size was 100 SMEs, selected using stratified random sampling. Data were collected using a questionnaire and an observation list. Data collected using questionnaire were analyzed using Statistical Package for the Social Scientists (SPSS). The study found an absence of formal accounting systems in many firms due to lack of financial and accounting knowledge among the owner‐managers. It is recommended that financial institutions and policy makers need to focus on educating such owner‐managers with necessary accounting and financial management skills.

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