Details of a Researcher - Kazekami, Sachiko

Kazekami, Sachiko

写真a

Affiliation: Faculty of Business and Commerce (Mita)

Position: Professor

Page Top ▲

Research Areas 【 Display / hide 】

Humanities & Social Sciences / Economic policy
Humanities & Social Sciences / Public economics and labor economics

Page Top ▲

Research Keywords 【 Display / hide 】

Labor Economics

Page Top ▲

Books 【 Display / hide 】

労働経済

清家篤・風神佐知子, 東洋経済新報社, 2020.09

Page Top ▲

Papers 【 Display / hide 】

Do small firms truly not exert monopsony power over workers?

Sachiko Kazekami

under review 2025.03

Lead author, Last author, Corresponding author

　View Summary

This study analyzes how monopsony power varies over time by establishment size and examines the factors driving these differences. This is because workers in large firms tend to have greater mobility, which expands their labor market beyond the local level and increases alternative employment opportunities. At the same time, workers in small firms that are more regionally constrained may have fewer options, leading to less competitive labor market conditions.
To measure monopsony power, separation elasticity was estimated using a Cox model with individual Japanese data from 2017 to 2024. The results indicate that elasticity in small establishments is relatively low, suggesting weaker labor market competition. While wage elasticity remains stagnant in small establishments, it increases in large establishments over time. To identify the driving factors, this study measures the range of employment options using the Outside Options Index. The findings suggest that declining employment opportunities for individuals working in small establishments contribute to their lower elasticity.
This study contributes to clarifying that small establishments, which tend to have limited monopsony power in product markets, do not necessarily experience similar constraints in labor markets. Their monopsony power reflects not only structural conditions but also behavioral constraints. This helps explain wage differentials between establishment sizes. Furthermore, it serves as a preliminary analysis to examine whether teleworking expansion increases competition, compelling small firms to raise wages, or, conversely, whether wage growth occurs in monopsonistic labor markets as labor supply declines in Japan and other advanced economies, as the marginal productivity of labor decreases.
Effects of Minimum Wage Changes on Labor Demand

Sachiko Kazekami and Masahiro Abe

SSRN 2024.11

Lead author
Does Working from Home Encourage People in Japan to Work?

Sachiko Kazekami

SSRN 2024.10

Single Work
Linkage, sectoral productivity, and employment spread

sachiko Kazekami

Structural Change and Economic Dynamics (Elsevier) 69 108 - 123 2024.06

Research paper (scientific journal), Single Work, Lead author, Accepted
- Access to Document (DOI)
Aging Workforce, Productivity, and Wages in Japan

Mingyu Jiang, Sachiko Kazekami, Hiroki Yasuda, Kazufumi Yugami

Work, Aging and Retirement (the Oxford University Press) 2023.07

Research paper (scientific journal), Joint Work, Accepted

　View Summary

We use a panel data set of Japanese firms from 2005 to 2019 to examine how a firm’s employee age structure affects its productivity and wages. The pooled ordinary-least-squares (OLS) results indicate a negative relationship between the proportion of older employees and labor productivity. However, the effects disappear after applying a fixed effects (FE) model and the generalized method of moments to consider the unobserved heterogeneity among firms. Moreover, the proportion of older employees does not significantly affect firms’ wages. We further examine firm heterogeneity as a factor that contributes to the difference between the pooled OLS and FE estimates. The results suggest that differences in corporate stakeholder characteristics and corporate governance, such as the presence of labor unions and proportion of foreign ownership, may be related to the ratio of older workers and corporate performance.
- Access to Document (DOI)

display all >>

Page Top ▲

Papers, etc., Registered in KOARA 【 Display / hide 】

The empirical analysis of trade impact on employment and wages using matched Japanese employer-employee data

Kazekami, Sachiko

科学研究費補助金研究成果報告書 2021
The effect of teleworking on the productivity, human resources and local economy in the rural areas

Kazekami, Sachiko

学事振興資金研究成果実績報告書 (慶應義塾大学) 2019
経済発展・自己雇用者・不平等の三者関係

Kazekami, Sachiko

KEO discussion paper (Keio Economic Observatory Sangyo Kenkyujo) ( 110 ) 2007.09
Economic growth and inequality : a panel data approach

Kazekami, Sachiko

Mita business review (慶應義塾大学出版会) 50 ( 1 ) 217 - 239 2007.04

ISSN 0544571X

Page Top ▲

Reviews, Commentaries, etc. 【 Display / hide 】

雇用と賃金の関係

風神佐知子

日本経済新聞「やさしい経済学」 2024.09

Lead author
高所得の仕事の恩恵はほかの部門に波及しにくい

風神佐知子

週刊東洋経済 (東洋経済新報社 ) 86 - 87 2023.09

Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media), Single Work, Lead author
インタビュー　series academia

d's Journal 2021.10
デジタル時代の働き方の展望について

風神佐知子

人と国土21 9月 2021.09

Single Work
多様化する働き方と賃金の在り方

KAZEKAMI Sachiko

時局 (時局社) ( 4月 ) 38 - 39 2018.03

Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media), Single Work

display all >>

Page Top ▲

Presentations 【 Display / hide 】

Skill Requirements and the Consequences of Job Changes

Sachiko Kazekami

The 2nd Keio International Conference on Empirical Applied Microeconomics (Keio University) ,

2024.02

-

2024.03
,
Oral presentation (general)

　View Summary

This study investigates the effect of an increase in the industrial requirements for different types of skills and knowledge on the wages of job changers in Japan during the 2000s. It found negative impacts on post-turnover wages for certain types of skills and knowledge. In addition, it confirmed that job changers’ wages increase when they enter a firm in an industry where the required skills and knowledge have increased. Interestingly, the types of required skills and knowledge that threaten workers differ from those that raise post-turnover wages. The findings suggest that politicians should emphasize not only new emerging technologies, but also certain types of knowledge in reskilling policies. Furthermore, the increase in the industrial requirements for basic skills and knowledge and the increase in all types of skills and knowledge of workers do not affect the geographical mobility of job changers. This highlights anew that workers are confined to the same land, leading to lower wages. Given that people do not move easily, measures to boost regional employment are required.
Linkage, Sectoral Productivity and Employment Spread

Sachiko Kazekami

The 1st Keio International Conference on Empirical Applied Microeconomics (Keio University) ,

2023.02
,
Oral presentation (general)
最低賃金の変更が地域雇用にどのような影響を与えるか―求人広告データを用いた推定

風神佐知子（阿部正浩氏と共著）

2022年度秋季日本経済学会全国大会 (慶應義塾大学) ,

2022.10
,
Oral presentation (general)
最低賃金の変更が地域雇用にどのような影響を与えるか―求人広告データを用いた推定

風神佐知子（阿部正浩氏と共著）

中央大学セミナー,

2022.07
,
Symposium, workshop panel (nominated)
最低賃金の変更が地域雇用にどのような影響を与えるか―求人広告データを用いた推定

風神佐知子（阿部正浩氏と共著）

応用経済学ワークショップ,

2022.06
,
Symposium, workshop panel (nominated)

display all >>

Page Top ▲

Research Projects of Competitive Funds, etc. 【 Display / hide 】

雇用の質を考慮した地域・企業規模間等の定量的な雇用の波及過程と効果の研究

2019.04

-

2024.03

MEXT,JSPS, Grant-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), Principal investigator

Page Top ▲