scholarly journals Assessing network structure with practical sampling methods

2018 ◽  
Author(s):  
Georgiy Bobashev ◽  
R. Joey Morris ◽  
Elizabeth Costenbader ◽  
Kyle Vincent
Keyword(s):  
Network Structure ◽  
Sampling Method ◽  
Sampling Design ◽  
Sampling Methods ◽  
Simple Random Sampling ◽  
Underlying Structure ◽  
Snowball Sampling ◽  
Using Data ◽  
Network Metrics ◽  
Selection Of

Using data from an enumerated network of worldwide flight connections between airports, we examine how sampling designs and sample size influence network metrics. Specifically, we apply three types of sampling designs: simple random sampling, nonrandom strategic sampling (i.e., selection of the largest airports), and a variation of snowball sampling. For the latter sampling method, we design what we refer to as a controlled snowball sampling design, which selects nodes in a manner analogous to a respondent-driven sampling design. For each design, we evaluate five commonly used measures of network structure and examine the percentage of total air traffic accounted for by each design. The empirical application shows that (1) the random and controlled snowball sampling designs give rise to more efficient estimates of the true underlying structure, and (2) the strategic sampling method can account for a greater proportion of the total number of passenger movements occurring in the network.

PEMASARAN SELEDRI DI DESA OEPAHA KECAMATAN NEKAMESE KABUPATEN KUPANG

2020 ◽  
Vol 21 (2) ◽  
pp. 122-129
Author(s):  
Maria C K Nadjib ◽  
Alfetri N.P Lango ◽  
Paulus Un
Keyword(s):  
Sampling Methods ◽  
Descriptive Analysis ◽  
Marketing Channel ◽  
Simple Random Sampling ◽  
Market Information ◽  
Snowball Sampling ◽  
Zero Level ◽  
Farming Community ◽  
Profit Analysis ◽  
The Village

The research, which was conducted in the village of Oepaha, Nekamese District, Kupang Regency, from June to July 2019, aims to identify marketing channels, capabilities and margins, and the share and benefits of celery marketing for farmers. The location of the research was determined using purposive sampling methods, considering that the location was the most important supplier area for celery in Kupang Regency. The population in this study was the farming community in Oepaha Village, Nekamese district, Kupang Regency,in the amount of 96 celery farmers. The sampling methods is carried out by simple random sampling according to the Slovenian formula, so that a sample of 49 celery farmers is obtained. Sampling for marketing institutions was determined by selecting the marketing institutions which directly involved in celery marketing using snowball sampling methods. In the end, respondents selected marketing institutes consisting of village collectors amounted to 4 people and retailers amounted to 4 people. The analysis of the data used in this study includes descriptive analysis, marketing margin analysis, farmer's share analysis and marketing profit analysis. The results showed that the marketing channel for celery carried out by farmers consisted of two channels, namely farmers directly to consumers and farmers to consumers through intermediaries, namely village collectors and retailers. Celery marketing functions that arise are the functions of sales, purchases, transport, standardization and financing and market information on the zero level channel,while sales, purchasing, transportation, storage, standardization, and financing, as well as market information, run on the second level channel. The marketing margin at zero level is Rp. 51.000,-, while the second level marketing channel is Rp. 17,000 at the collector and Rp. 34,000 at the retailer. The percentage of farmer’s share received by farmers is 25% at zero level and 25% at second level channel. The profit from celery marketing in the zero level marketing channel is Rp. 8.261 (farmers), the second level marketing channel is Rp. 16,688 (farmers), Rp. 15.267 (collectors' traders), Rp. 28,029 (retailers).

Analisis Efisiensi Pemasaran Tempe (Studi Kasus di Sentra Produksi Tempe Sanan, Kelurahan Purwantoro, Kecamatan Blimbing, Kota Malang)

2019 ◽  
Vol 6 (01) ◽  
pp. 57-67
Author(s):  
Maria Christina Sarkol ◽  
Lisa Kurniawati ◽  
Sari Perwita
Keyword(s):  
Sampling Method ◽  
Simple Random Sampling ◽  
Marketing Channels ◽  
Dominant Factor ◽  
Selling Price ◽  
Snowball Sampling ◽  
The Third ◽  
Marketing Process ◽  
Marketing Efficiency

Tempeh industry is a typical household business that requires little investment and has few workers. Efficient marketing could optimize the income of tempeh’s producers. This research aims to understand the marketing efficiency and factors that affect the purchasing margin of tempeh in selected areas. This research will study the value of farmer’s share and the marketing margin of tempeh to evaluate the commerce efficiency. The sampels are the producers and sellers. 58 tempeh’s producers are selected by the simple random sampling method. The sellers, on the other hand, are chosen using the snowball sampling, a technique that tracks down the marketing process. The variable studied in the  research are as follows: 1) producer’s tempeh’s selling cost, 2) tempeh’s selling price on commercial institution, 3) marketing cost, 4) total amount of sold products, 5) numbers of  marketing  institution  where the  product  passes,  6)  the  marketing margin, 7) the farmer’s share, and 8) marketing efficiency. The research finds three marketing channels on the case study areas. The first channel is from the producers to tempeh. The second channel is form producers to retailers to consumers. The third channel is from producers to peddlers to consumers. By using the farmer’s share, the calculation of commerce efficiency. The leading cause is the lack of middlemen. Moreover, the double regression analysis show the retailers tempeh selling cost (X4) to be the dominant factor in the marketing margin of tempeh.

scholarly journals COMMERCIAL VEGETABLE SUPPLY CHAINS IN THE TRADITIONAL MARKET OF BOGOR CITY THAT GIVE TO FARMERS

2019 ◽  
Vol 9 (2) ◽  
Author(s):  
Himmatul Miftah ◽  
Arti Yoesdiarti ◽  
Tiara Dewi Soka
Keyword(s):  
Supply Chain ◽  
Supply Chains ◽  
Sampling Method ◽  
Snowball Sampling ◽  
Purposive Sampling ◽  
Traditional Market ◽  
Share Value ◽  
Selection Of

The price gap between farmers and retailers in commercial vegetables like spinach, tomatoes, potatoes and shallots in Bogor City was predicted as a result from the high trading margin. The research aims to analyze income, margin and farmer share obtained by commercial vegetable supply chain actors in Bogor City. The study was conducted in March - October 2017 at the Bogor Traditional Market and the Jambu Traditional Market. The selection of respondents used the purposive sampling and snowball sampling method. Result shows that the R / C ratio of farmers is lower than that of traders. The R/C ratio received by farmers is 1,48, while that received by traders is 2,64. The average Farmer Share (41,2%) is lower than the seller share (58,8%). The average marketing margin is Rp 14,576.5. The supply chain that take side to farmers regarding to the value of R/C, the total margin and the farmer's share value are found in potato commodities because it has a higher R / C ratio than traders, higher farmer shares than traders, and trading margin that lower than the three other commodities compared

scholarly journals The practice of job crafting and its impact on job outcomes

2020 ◽  
Vol 9 (5) ◽  
pp. 192-199
Author(s):  
Banta Karollah ◽  
Yuli Monita ◽  
Vilzati Vilzati ◽  
Muhammad Muhammad ◽  
Mahdani Ibrahim
Keyword(s):  
Job Satisfaction ◽  
Work Engagement ◽  
Sampling Method ◽  
Linear Regression Analysis ◽  
Simple Random Sampling ◽  
Job Crafting ◽  
Primary Data ◽  
Simple Linear Regression ◽  
Job Outcomes ◽  
Selection Of

This study aims to investigate the effect of job crafting practices on job outcomes (work engagement and job satisfaction). This research was conducted on workers at Perseroan Terbatas (PT). Petra Arun Gas (PAG) with a working population of 180 people. Samples were taken as many as 123 people based on Krejcie and Morgan Sample Tables (in Sekaran & Bougie, 2009, pp. 254-255). The selection of sample members was carried out using the simple random sampling method. Primary data is obtained by distributing questionnaires to all samples. Data were analyzed using simple linear regression analysis tools with the help of SPSS. The results of the research data analysis show that job crafting has a significant effect on the two dependent constructs, namely work engagement and job satisfaction.

scholarly journals RANTAI PASOK KOMODITAS KACANG TANAH DI KABUPATEN MUNA

2019 ◽  
Vol 4 (1) ◽  
Author(s):  
Abdul Rahman ◽  
Usman Rianse ◽  
Sitti Aida Adha Taridala
Keyword(s):  
Supply Chain ◽  
Random Sampling ◽  
Sampling Method ◽  
Simple Random Sampling ◽  
Supply Chain Performance ◽  
Good Position ◽  
Order Fulfillment ◽  
Snowball Sampling ◽  
Qualitative Descriptive ◽  
Model Approach

This research aims to analyze (1) supply chain path, and (2) the performance of a supply chain commodity peanut Muna Regency. Sampling method used in this research was simple random sampling and snowball sampling. Supply chain path analyzed in qualitative descriptive. Supply chain performance is analyzed with a model approach to Supply Chain Operations Reference (SCOR). The results showed that members of the supply chain consists of peanut farmers, village collector (PPD), Sub-district collector (PPK) and inter-insular traders (PAP). There are three pathways of a supply chain that is a path I: farmer → PPD → PAP; path II: farmer → PPK → PAP; and path III: farmer → PAP. Supply chain performance attributes based on shipping and order fulfillment cycle, farmers are in the position and traders are at a good position..Keywords: peanuts; supply chains; traders; SCOR

scholarly journals WOMEN’S EXPERIENCE IN USING “COMPLEMENTARY NURSING ON INFERTILITY”

2020 ◽  
Vol 16 (1) ◽  
pp. 41
Author(s):  
Belet Lydia Ingrit
Keyword(s):  
Complementary Therapies ◽  
Sampling Method ◽  
Complementary Therapy ◽  
Snowball Sampling ◽  
Inclusion Criteria ◽  
Infertile Women ◽  
The Family ◽  
Field Notes ◽  
Depth Interviews ◽  
Selection Of

The development of complementary therapies especially infertility treatment is increasing. A qualitative research was conducted to explore the experience of infertile women undergoing nursing complementary therapy. Eight women participated in this research were selected by purposive sampling method based on the inclusion criteria. Selection of participants was done using snowball sampling. Data were collected through in-depth interviews and field notes. Data analysis was performed using thematic content analysis and stages suggested by Collaizi. The results of this research  were: 1) Feeling of sadness was experienced by infertile women 2) Increasing age and the insistence of the family caused anxiety to infertile women, 3) Infertile women chose nursing complementary because they want to get pregnant naturally 4) Various ways and efforts were done by infertile women to get pregnant, 5) Infertile women had appropriate perception toward complementary nursing 6) Family supports were needed to succeed the complementary nursing. In conclusion, complementary nursing was very important to be chosen as one of solution for infertile couples. It is recommended that maternity nurses optimize their roles in giving information and support to infertile women.

scholarly journals COMPARATIVE STUDY OF GENDER AND AREA WISE ANXIETY LEVEL OF SENIOR CITIZENS OF HIMACHAL PRADESH AND UTTAR PRADESH STATE OF INDIA

2019 ◽  
Vol 7 (3) ◽  
pp. 30-37
Author(s):  
Ashwani Kumar ◽  
Mamta Singh Rathour
Keyword(s):  
Sampling Method ◽  
Senior Citizens ◽  
Uttar Pradesh ◽  
Simple Random Sampling ◽  
Himachal Pradesh ◽  
Anxiety Level ◽  
Chi Square ◽  
Taylor Manifest Anxiety Scale ◽  
Manifest Anxiety ◽  
Selection Of

The main objective of the study was to compare the Anxiety Level of Senior Citizens of Himachal Pradesh and Uttar Pradesh State of India. The present researcher used simple random sampling method for the selection of 2000 subjects (Senior Citizens) for the present study. 100 Male and 100 Female Senior Citizens were taken together from each district taken for the present study of Himachal Pradesh and Uttar Pradesh State of India. The study was conducted by using the Standardized Questionnaires for measuring the Anxiety Status of Senior Citizens. - Taylor Manifest Anxiety Scale (TMAS). The data collected was statistically analyzed by using Percentage and Chi Square was specially used to found the significance difference in Anxiety Level of both states. Conclusion: The male and female senior citizens of Himachal Pradesh and Uttar Pradesh differed significantly in respect to their Anxiety Level.

scholarly journals PENGARUH PENGALAMAN AUDITOR, KOMPETENSI PROFESIONAL, DAN KOMPLEKSITAS TUGAS TERHADAP AUDIT JUDGMENT (STUDI PADA KANTOR AKUNTAN PUBLIK DI KOTA SURABAYA)

2020 ◽  
Vol 3 (1) ◽  
pp. 73-89
Author(s):  
Novia Eka Rahmadanty ◽  
Muslimin Muslimin
Keyword(s):  
Sampling Method ◽  
Professional Competence ◽  
Task Complexity ◽  
Population Sample ◽  
Simple Random Sampling ◽  
The Public ◽  
Audit Judgment ◽  
Using Data ◽  
And Task ◽  
Public Accountant

The research purpose is to determine and empirically test the effect of auditor experience, professional competence, and task complexity on audit judgment. The research using quantitative approach. The research is using population sample of the auditor who works under the Public Accountant Office (KAP) in the Surabaya, which is registered in the IAPI 2019 Directory. Sampling in this research uses probability sampling techniques with a simple random sampling method and a sample of 52 auditors is obtained. The analytical method used is multiple linear regression using data quality tests, normality tests, classic assumption test, and hypothesis testing using SPSS version 23. The results of this study indicate that the auditor's experience, professional competence, and task complexity simultaneously influence on audit judgment. Partially, auditor experience and professional competence has negative and not significantly effect on “audit judgment”. While the “task complexity has a positive and significant effect on audit judgment.

scholarly journals SAMPLING METHODS AND NUMBER OF ROUNDWOODS FOR DETERMINING THE MOISTURE CONTENT

2018 ◽  
Vol 42 (4) ◽  
Author(s):  
Danilo Barros Donato ◽  
Renato Vinícius Oliveira Castro ◽  
Angélica de Cássia Oliveira Carneiro ◽  
Ana Márcia Macedo Ladeira Carvalho ◽  
Benedito Rocha Vital ◽  
...  
Keyword(s):  
Moisture Content ◽  
Random Sampling ◽  
Sampling Method ◽  
Optimal Allocation ◽  
Sampling Methods ◽  
Simple Random Sampling ◽  
Optimum Number ◽  
Average Standard Deviation ◽  
Proportional Allocation ◽  
Allowable Error

ABSTRACT This study had the objective of comparing two methodologies of sampling, Simple Random Sampling (ACS) and Stratified Random Sampling (ACE) to determine the optimum number of roundwood samples to obtain the moisture content of the population. In order to achieve this goal, different percentages of allowable error (5,10,15 and 20%) were considered for each sampling methodology. In the conduction of this study, the samples were randomly taken from a lot of 250 steres of wood, 144 roundwood of three meters of length and distributed in four classes of diameter. Later, the moisture content of these samples was determined. And, from these values, the population estimates (average, standard deviation, variance, coefficient of variation, and standard error) by ACS and ACE methods, helped to determine the optimum number of roundwood (n) to be sampled from different percentages of allowable error adopted in this study at 95% probability. According to the results, the amount of roundwood to be sampled from ACS for each allowable error 5, 10, 15 and 20% was respectively 214, 55, 25 and 14. For the ACE (proportional allocation) the amount of roundwood was 141, 35, 16 and 9 for ACE (optimal allocation) this number was 136, 34, 15 and 8. It was concluded that the most indicated sampling method for this study, considering the allowable error, was the ACE method.

Subject Recommended Samples

2013 ◽  
pp. 43-57 ◽  
Author(s):  
Pedro Isaías ◽  
Sara Pífano ◽  
Paula Miranda
Keyword(s):  
Sampling Method ◽  
Relevant Literature ◽  
Reliability And Validity ◽  
Lessons Learned ◽  
Snowball Sampling ◽  
Online Questionnaire ◽  
A Chain ◽  
Sample Method ◽  
Introductory Review ◽  
Selection Of

In a research project, the selection of the sample method is crucial, since it has repercussions throughout the entirety of the study. It determines how the population under scrutiny will be represented and with what accuracy. Hence, it has an important impact in terms of the reliability and validity of the research in general, and consequently, its conclusions. This chapter aims to explore snowball sampling as a chain-referral sampling method. An introductory review of the relevant literature highlights its main characteristics, benefits, and shortcomings, and provides a broader insight to circumstances where it can be successfully applied. This theoretical prologue is followed by the analysis of its employment in an online questionnaire and the presentation of the lessons learned from this sampling decision.

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