• 제목/요약/키워드: Difference-in-differences analysis

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The Clothing Selection Criteria according to Consumers' Eco-friendly Attitude and Demographic Characteristics (소비자의 친환경 태도 및 인구통계적 특성에 따른 의복선택 기준의 특징)

  • Park, Younghee
    • Journal of the Korea Fashion and Costume Design Association
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    • 제18권1호
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    • pp.11-22
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    • 2016
  • The purpose of this study was to analyze the statistical differences and the correlation between eco-friendly attitudes and clothing selection criteria according to gender and age. 150 people in their 20s to 50s were surveyed for this study. The results were as follows. The factors to eco-friendly attitudes were drawn as seven factors. The difference analysis result for eco-friendly attitude according to gender and age showed a significant difference. The results of factor analysis showed that there were four factors in clothing selection criteria. The difference analysis result of clothing selection criteria according to gender showed a significant difference. The analysis results for the effect of eco-friendly attitude on clothing selection criteria showed that the eco-friendly group recognized health and eco-friendly property as more important clothing selection criteria, but the non-eco-friendly group recognized aesthetic as more important one. The result of this study will help product planners in the clothing product development and the market segmentation according to eco-friendly attitude.

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Analysis of the Health Expenditure and Medical Usage Difference of the Baby Boomers between Male and Female: Depression as a Mediators (베이비붐세대의 남녀 간 의료비 지출 및 의료이용 차이: 우울을 매개변수로)

  • Jeong, Ji Yun;Jeong, Jae Yeon;Cha, Sun Jung;Lee, Hae Jong
    • Health Policy and Management
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    • 제29권2호
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    • pp.160-171
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    • 2019
  • Background: This study purposed to compare the difference on medical utilization and health expenditure of baby boomer generation by depression between gender. Methods: Korea Welfare Panel Survey 2016, provided by the Korea Institute for Health and Social Affairs, was used for the analysis. For the research, we used the two-part model, yes or no of use (part 1), and frequency of use (part 2) for medical utilization. The dependent variables are the whether or not to use of hospitalization services, outpatient services, length of stay, outpatient service visits, and health expenditure. And the independent variables are used as the predisposing (education, spouse presence), enabling (insurance type, private insurance, economic activity, income), and need (chronic disease, self-rated health, disability) factors in the Andersen behavior model. Depression was used as intervening variables. Structural equation model and multiple group analysis by gender were used. Results: There were differences in the medical care usage and cost between men and women in baby boomer. For men, mediating effects of depression were present at the hospitalization (yes/no), length of stay, and health expenditure. On the other hand, for women, the mediating effect of depression was found only at the outpatient visits. Specially, depression was working at the medical services by the different way between gender. The size of effect (multiple group analysis) was affected by significant differences between men and women. Conclusion: This study found that the mediating effect of depression is increased medical usage and health expenditure and the effect factors are different by gender. Therefore, it is necessary to establish a medical care policy considering the socio-economic characteristics of baby boomers.

Comparison of different impression techniques for edentulous jaws using three-dimensional analysis

  • Jung, Sua;Park, Chan;Yang, Hong-So;Lim, Hyun-Pil;Yun, Kwi-Dug;Ying, Zhai;Park, Sang-Won
    • The Journal of Advanced Prosthodontics
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    • 제11권3호
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    • pp.179-186
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    • 2019
  • PURPOSE. The purpose of this study was to compare two novel impression methods and a conventional impression method for edentulous jaws using 3-dimensional (3D) analysis software. MATERIALS AND METHODS. Five edentulous patients (four men and one woman; mean age: 62.7 years) were included. Three impression techniques were used: conventional impression method (CI; control), simple modified closed-mouth impression method with a novel tray (SI), and digital impression method using an intraoral scanner (DI). Subsequently, a gypsum model was made, scanned, and superimposed using 3D analysis software. Mean area displacement was measured using CI method to evaluate differences in the impression surfaces as compared to those values obtained using SI and DI methods. The values were confirmed at two to five areas to determine the differences. CI and SI were compared at all areas, while CI and DI were compared at the supporting areas. Kruskal-Wallis test was performed for all data. Statistical significance was considered at P value <.05. RESULTS. In the comparison of the CI and SI methods, the greatest difference was observed in the mandibular vestibule without statistical significance (P>.05); the difference was < 0.14 mm in the maxilla. The difference in the edentulous supporting areas between the CI and DI methods was not significant (P>.05). CONCLUSION. The CI, SI, and DI methods were effective in making impressions of the supporting areas in edentulous patients. The SI method showed clinically applicability.

The Relationships between Product Quality Cues and Perceived Values based on Gender Differences at a Food Select Shop

  • Yim, Myung-Seong
    • The Journal of Industrial Distribution & Business
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    • 제11권10호
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    • pp.59-73
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    • 2020
  • Purpose: The ultimate purpose of this work is to investigate gender differences in the relationships between product quality cues and perceived values at a food select shop. Specifically, this study examines the effects of internal and external cues, which are indicators of product quality, on emotional and social values based on gender differences. Research design, data and methodology: In this study, a questionnaire technique was used to collect the data necessary to test the proposed model. 183 data were collected through this technique. PLS SEM (Partial Least Squares Structured Equation Model) was used to test the research model. Results: First, there is no gender difference between intrinsic cue and emotional value. When using male and female data, there was no significant causal relationship between intrinsic cues and emotional values. Second, we found no gender difference between intrinsic cue and social value. When analyzed with female data, there was no significant causal relationship between intrinsic cue and social value. On the other hand, in the case of men, it was found that a weak causal relationship exists. Third, this study found gender difference between extrinsic cue and emotional value. In the case of men, it was found that a weak causal relationship exists, whereas in the case of women, a strong causal relationship exists between extrinsic cue and emotional value. Fourth, we found gender difference between extrinsic cue and social value. In the case of men, there was no causal relationship, whereas in the case of women, there was a strong causal relationship between extrinsic cue and social value. Finally, we found that there are moderating roles of gender in the relationship between external cues and perceived quality. Conclusions: As a result of analysis, it is necessary to focus on extrinsic clues of product in order to increase the perceived emotional and social values of women. On the other hand, in order to improve the perceived emotional and social values of men, it is necessary to pay attention to both intrinsic and extrinsic cues of product. Therefore, it is necessary to consider what clues and values are important to core customers.

A Study on Generational Differences in the Internet Use and Privacy Paradox (인터넷 이용과 프라이버시 역설에 대한 세대별 차이 연구)

  • Koh, Heungseok;Kim, Changjung
    • Journal of Korea Multimedia Society
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    • 제22권9호
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    • pp.1046-1054
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    • 2019
  • With regard to the diffusion of mobile Internet service and generational differences for Internet use, this study aims to explore the relationship between the Internet activities and privacy concern based on the media dependency theory. Using the Korea Media Panel data produced by KISDI in 2018, this study analysed 8,988 nation-wide samples to test the difference of Internet use in personal privacy concern among generations. The results of the study showed that there was statistically significant difference for privacy concern among generations. This study has an implication to reveal the phenomenon of 'privacy paradox' by showing that SNS use negatively influenced users' privacy concern.

A Comparative Analysis between Manufacturing and Transactional/Service Processes of Six Sigma Quality Improvement (제조부문과 사무간접/서비스부문의 6시그마 프로세스 개선활동 비교분석)

  • Yoon, Jae-Wook;Kim, Bo-Hyoung
    • Journal of Korean Society for Quality Management
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    • 제36권4호
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    • pp.37-46
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    • 2008
  • There are big differences in six sigma projects between manufacturing processes and transactional/service processes. This paper analyzed the differences between the two areas by examining 18 six sigma case studies in Korean companies. To characterize six sigma case studies, step-by-step questions and check criteria were developed based on 12 step DMAIC methodology. On the basis of those characterized data, the differences between two areas were analyzed. Significant differences were found in the number of CTQs, validation of measurement systems, methods to determine improvement objectives, the methods to elicit improvement plans and types of control systems. The most significant difference was that statistical tools were widely used in manufacturing processes, but qualitative tools were used in transactional/service processes during improvement phase.

Analysis of Door Height Difference and Door Flatness Difference of Built-in Side-by-Side Refrigerator Using Cabinet-Door Integrated Model (캐비닛-도어 통합모델을 이용한 빌트인 양문형 냉장고의 도어 상하단차와 앞뒤단차 해석)

  • Lee, Boo-Youn
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • 제17권5호
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    • pp.76-83
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    • 2018
  • A cabinet-door integrated finite element model was constructed for a built-in side-by-side refrigerator with an ice dispenser, and its deformation was analyzed using the ANSYS finite element software. As loads, the food load needed to fill in the cabinet and doors and the thermal load occurring during normal operation conditions were taken into consideration. The door height difference (DHD) and door flatness difference (DFD) between the two doors of the freezing and refrigerating compartments were derived. The DHD and DFD under the assembled condition without applied loads satisfied the acceptance criteria specified by the refrigerator manufacturer. It appeared that the food load increases the DFD slightly. The thermal load tends to increase the differences because of the thermal deformation, especially the DFD, of the cabinet and doors.

The Impact of Cross-Cultural Differences on Human Resource Management in Korean-Invested Enterprises in China

  • Li, Hao;Li, Yu
    • Journal of Korea Trade
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    • 제25권2호
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    • pp.46-57
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    • 2021
  • Purpose - In terms of human resource management, many Korean enterprises in China have experienced problems such as frequent resignations of Chinese employees and labor disputes. This can be mainly attributed to the fact that Chinese employees are not consistent with Korean vertical management methods, which is closely related to the national culture theory proposed by Hofstede, specifically the dimension of power distance and long- versus short-term orientation (LTO). Therefore, this research aims to investigate cultural differences between Korea and China from these two dimensions, and the impact on the human resource management of Korean-invested enterprises in China. Design/methodology - This research first utilizes the latest data (Wave 7) of the World Values Survey (WVS) to verify the difference in power distance and long- versus short-term orientation between Korean and Chinese cultures using responses from Korea and China, and then uses case analysis to analyze the impact of this cultural difference on the human resource management of Korean enterprises in China. Findings - Our main findings can be summarized as follows. Korea and China have significant differences in power distance and long- versus short-term orientation. In terms of power distance, Korean respondents show higher power distance compared to Chinese respondents. In the dimension of long- versus short-term orientation, it was found that Chinese respondents showed a shorter-term orientation, whereas Korean respondents showed a longer-term orientation. Originality/value - Previous studies put focus on the power distance and individualism-collectivism dimensions to explain cultural differences between Korea and China, and generated contradictory results. This research further confirms the cultural differences between Korea and China from the dimensions of power distance and long-versus short-term orientation using secondary data. The comparative studies from this perspective have long been underexplored and lack empirical confirmation.

The Study of Premenstrual Syndrome, Dysmenorrhea, and Stress according to the Gender Role Identity of Female University Students (여대생의 성역할정체감유형에 따른 월경전기증후군, 월경통 및 스트레스)

  • Chang, Hae Kyung
    • Korean Journal of Adult Nursing
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    • 제19권1호
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    • pp.89-97
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    • 2007
  • Purpose: This study was to examine the differences in the degree of premenstrual syndrome, dysmenorrhea, and stress according to the gender role identity of female university students. Methods: Data were collected by self-reported questionnaires from 308 female university students. Data analysis was done with SPSS 10.1 for descriptive statistics, ANOVA, and Duncan's multiple-range test. Results: The most prevalent type of premenstrual syndrome was androgenic(33.8%), followed by undifferentiated(25.0%). There was a significant difference in dysmenorrhea according to residence. In addition, there were significant differences in premenstrual syndrome according to age, and in stress according to age and economic status. Also, there was no significant difference according to dysmenorrhea and there were significant differences in premenstrual syndrome and dysmenorrhea according to gender role identity. Premenstrual syndrome and stress were the most prevalence in female type, but the lowest severe in masculine type. Conclusion: The study variables can be influencing factors in the gender role identity of female university students. Also, the findings can provide the basis for the development of nursing interventions to establish the gender role identity of female university students.

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Changes in Respiratory Function Due to Differences in Mask Blocking Grade and Effects on Cardiovascular Function during Aerobic Exercise with Mask

  • Park, Kwanghyeon;Lee, Sangyeol
    • Physical Therapy Rehabilitation Science
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    • 제10권3호
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    • pp.289-296
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    • 2021
  • Objective: The purpose of this study was to changes in respiratory function due to differences in mask blocking grade, and effects on cardiovascular function during aerobic exercise. Design: Comparative study using paired t-test and analysis of variance measures. Methods: Male and female subjects were randomly divided into 4 groups according to mask blocking grade and measured respiratory functions before and after wearing the mask using spirometers, and their cardiovascular capabilities were measured using pulse oxygen meters and blood pressure meters before and after running for 10 minutes wearing mask. Used paired t-test, one-way ANOVA and Bonferroni post-test to compare the differences according to the mask blocking grade. Results: The experimental results verified that three groups except for the Non-mask group had a significant reduction in all values of FVC, FEV1, MVV, and PEF after wearing a mask compared to those before wearing a mask(p<0.05). Also a significant difference in cardiovascular functions was also observed after aerobic exercises wearing mask in all groups and there was a significant difference between all four groups(p<0.05). Conclusions: Lung patients with poor breathing, elderly and children with poor lung function, and professional groups who need to wear masks and take high-intensity work or aerobic movements are encouraged to take frequent breaks in advance, wear masks and social distancing at moderate and low levels.