Although concerns about overheating of the franchise industry's market structure continue to be raised, there are few studies that analyze the market structure of the franchise industry and suggest practical use. Most existing studies mainly analyze the market structure of other industries using industrial concentration(HHI) as an indicator of market competition intensity from the perspective of industrial organization theory. This study seeks to present a market structure analysis method that is different from existing methods. Considering practical application, this study presented a method to analyze the market structure that combines industry concentration(HHI) analysis and matrix analysis of the franchise industry. First, the industry concentration(HHI) and operating profit ratio(SMR) of 15 major industries in the franchise industry were analyzed in a time series manner (2014-2019). Second, using industrial concentration and operating profit ratio(SMR) as two variables on the x-axis and y-axis, a two-stage matrix analysis was used to understand the market structure characteristics of 15 industries at a glance. Third, a method of utilizing the matrix analysis results for practical decision-making was presented.

Neutropenia is a common finding in pediatrics with 1.5-9% of children (without malignancy) presenting to hospital found incidentally to be neutropenic. The majority of these pediatric patients with transient neutropenia present with infectious symptoms with an infectious agent proven in approximately 50% of cases, most commonly viral in nature. 270 children, who were diagnosed with influenza infection at the Chosun University Hospital during a 8-year period, were included in the study. Clinical and laboratory feature were analyzed. 46 patients (17%) were neutropenic with no identifiable cause other than the influenza. The incidence of leukopenia was significantly higher in association with influenza B than influenza A (24.0% vs 12.3%). Period from the onset of fever to lymphopenia was significantly longer in association with neutropenia (+) group than neutropenia (−) group. Recovery period of neutropenia was mean 4 days (range 3-7 days). We conclude that mild, transient neutropenia is common among patients with influenza infection and advise that it should not cause alarm or invite specific investigation unless severe or prolonged.