core, found that supervisory board’s constraints on
the manager's over-investment behavior is not fully
realized. Hu Haichuan, Zhang Xinling (2013) tested
the relationship between supervisory board
characteristics and the quality of information
disclosure of listed company, found that the Board of
Supervisors is negligible to improve the quality of
information disclosure.
However, there are also some studies suggest that
the Supervisory Board continues to play an
irreplaceable role in corporate governance. Firth et
al., (2007) found that the size of the Supervisory
Board, the Board of Supervisors meeting times is
positive related to earnings information content. Li
Weian, Hao Chen (2006) evaluated the situation of
Supervisory Board governance from the
characteristic of the Supervisory Board, the
evaluation results showed that supervisors lack
competence is the cause of the low level of
Supervisory Board Governance, but still come to the
Supervisory Board as the statutory corporate
oversight institutions play an irreplaceable role in
supervising. Wang Shuhui, Tong Ning (2009) [9]
study showed that in addition to the size of the Board
of Supervisors had no significant effect on
performance, the annual number of meetings of the
Board of Supervisors, the ratio of external
supervisors, Board of Supervisors shareholding
proportion and Supervisors shareholding proportion
was significantly positively correlated with company
performance, and indicated since the new “Company
Law” implemented, the Board of Supervisors play a
larger role in corporate governance.
In summary, research on effectiveness of the
Board of Supervisors has not yet formed a clear and
consistent conclusion, previous studies mainly
focused on the discussion of the relationship between
general characteristics of the Board of Supervisors
and its financial supervision effect. This paper
focused on the individual characteristics of
Supervisory Board members, tested its members’
impacts on the supervision function. Through manual
collection of personal traits of the members of
Supervisory Board, this paper tested the influence of
their age, gender, degree, financial and banking
background on the level of earnings management,
provided an important and useful perspective for the
existing controversy about the effects of the Board of
Supervisors.
3 RESEARCH DESIGN
3.1 Samples Selection
In this paper, we selected Shanghai and Shenzhen
stock exchange listed companies in China as samples,
the research time interval was 2007-2012. Data from
CSMAR database, background characteristics of
members of the Board of Supervisors mainly based
on the manual screening to resumes in CSMAR
database. In this paper, I excluded financial,
insurance companies; companies with negative net
assets; companies listed less than one year;
companies without complete financial data and
finally got 9732 observations.
3.2 Variables Settings
3.2.1 The Dependent Variable
The dependent variable was the level of earnings
management (EM).In this paper, used the modified
Jones model (1995) to calculate discretionary
accruals, and then adopted its absolute value to
measure the level of earnings management.
3.2.2 The Independent Variables
AGE, it obtained by the average age of all the
members of the Supervisory Board of the company.
GEND, it obtained by the average data of all the
members of the Supervisory Board of the company.
Male take 0, female take 1.
DEGRE, it obtained by the average degree level. Less
than or equal to high school take 1; college take 2;
master take 3; doctor take 4.
FAB, it equalled to the number of supervisors having
the financial or auditing background divided by the
total number of supervisors.
BSB, it equalled to the number of supervisors having
a banking or securities background divided by the
total number of supervisors.
3.2.3 Control Variables
Reference existing research, this paper selected the
company assets (SIZE), financial leverage (LEV),
return on assets (ROA), firm growth (GROWTH),
loss situation (LOSS), audit firm rankings (BIG4), the
size of board of directors (BOARDSIZE), listed year
of the company (LISTAGE), the proportion of the
largest shareholder (GENT), actual controller (SOE),
industry and year as control variables.
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