Tài liệu tiếng Anh Role conflict role ambiguity job satisfaction
Trang 1Role Conflict, Role Ambiguity, Job Satisfaction, and Burnout
among Financial Advisors
Courtney Fichter, Ph.D Candidate and Dr John Cipolla
Lynn University, Boca Raton, FL
ABSTRACT
Financial advisors have begun to take on a more “counselor-type” role from the traditional broker Therefore, they have become more susceptible to role stressors (role ambiguity and role conflict) and decreased job satisfaction that could lead to burnout The purpose of this study is to examine and measure demographics of financial advisors, levels of role conflict and role ambiguity, as well as job satisfaction and burnout to determine the relationships between these variables The theoretical framework includes Maslach’s Burnout Inventory (1981), Herzberg’s Motivation-Hygiene Theory (1959), and role theory (Katz and Kahn, 1966, 1978) The corresponding measurement tools used to collect data will be Maslach’s General Survey (1996), the abridged Job Descriptive Index and the Job in General scale developed by Smith, Kendall and Hulin (1969), as well as Rizzo, House, and Lirtzman’s (1970) measures of role conflict and role ambiguity The objective of the study is to extend current literature by testing a “new” target population of professionals and determine the significance between demographics, role conflict, role ambiguity, job satisfaction, and burnout among financial advisors Results may help financial employers identify areas of role stress and job dissatisfaction to help reduce burnout and address employee-related issues such as turnover, absenteeism, and employee health
INTRODUCTION
As the role of the financial advisor continues to change, it is important to understand how financial advisors are adjusting to a more “counselor-type” role The Department of Labor (2007) suggests that the number of financial advisors within the United States will increase over the next ten years at a rapid rate, due to the projected number of retiring baby boomers This potential surge within the industry may cause rapid turnover as financial advisors may
be unable to meet the increasing demands from clients Firms need to understand how to retain their financial advisors, as well as “the reasons employees are leaving so they can make appropriate changes to their policies and operations” (Valentine, 2005, p 72) As more research is being done on the affects of burnout among service oriented professionals, “financial planners are as likely as any service provider to engage in emotional communication, which could lead to stress and burnout” (Koesten, 2005, p 64) With the increasing demands for emotional empathy with clients, “if planners aren’t equipped to manage the emotions that go along with that counseling posture, more and more planners will face the likelihood that they will experience burnout and perhaps leave the profession” (Koesten, 2005, p 65)
Tibergien and Palaveev (2001) discuss the increasing retention problems within the financial industry and Lin and Chang (2005) state that increased turnover could have “grave implications for the quality, consistency and stability of services to those who use financial services” (p 336) “Despite working in a highly rated occupation, financial planners are not immune to certain stressors that could lead to a variety of negative outcomes anecdotal evidence began to emerge that individuals in the financial planning profession were showing signs of burnout” (Koesten, 2005, pp 64-66) Before September 11th, 2001, the financial planning profession was rated “best overall job” by Jobs Rated Almanac As the market has experienced significant changes, financial planning as a profession has fallen and is now number 17 This drop raises the questions, what factors are causing the decrease in rating and could it be from an increase in burnout among financial advisors? (Koesten, 2005) This study aims to measure role conflict, role ambiguity, job satisfaction, and burnout to determine their impact on the changing role of the financial advisor
Job Satisfaction
Job satisfactions are “feelings or affective responses to facets of the situation” (Smith, Kendall, & Hulin,
1969, p 6) Smith, Kendall, and Hulin (1969) identify five variables of job satisfaction: the work itself, pay,
Trang 2et al., 1969) Pay addresses attitude toward pay, and is based on the perceived difference between actual pay and expected pay Promotion refers to the employee’s satisfaction with the organization’s promotion policy and its administration Supervision reflects the employee’s satisfaction with his or her supervisor(s) In general, the more considerate and employee-centered supervisors are, the greater the levels of employee satisfaction Coworkers are defined as the people on the present job, who impact the level of employee satisfaction with his or her fellow employees (Smith et al., 1969)
Role Conflict and Role Ambiguity
Katz and Kahn (1978) define role conflict as “the simultaneous occurrence of two or more role expectations such that compliance with one would make compliance with the other more difficult” (p 204) Rizzo, House, & Lirtzman (1970) define role conflict “ in terms of the dimensions of congruency-incongruency or compatibility-incompatibility in the requirements of the role, where congruency or compatibility is judged relative to
a set of standards or conditions, which impinge upon role performance” (p 155)
Katz and Kahn (1978) define role ambiguity as “uncertainty about what the occupant of a particular office
is supposed to do” (p 206) Role ambiguity “refers to uncertainty, on the part of employees, about key requirements
of their jobs, and about how they are expected to behave in those jobs” (Koustelios et al., 2004, p 87) Role ambiguity “is in terms of (1) the predictability of the outcome or responses to one’s behavior, and (2) the existence
or clarity of behavioral requirements, often in terms of inputs from the environment, which would serve to guide behavior and provide knowledge that the behavior is appropriate” (Rizzo et al., 1970, p 155-56)
Burnout
Burnout is defined by Maslach’s General Survey “as a crisis in one’s relationship with work, not necessarily as a crisis in one’s relationships with people at work” (Maslach, Jackson, & Leiter, 1996, p 20) Maslach (1982) identified three constructs that made up burnout They are emotional exhaustion, depersonalization
or cynicism, and lack of personal accomplishment or professional efficacy Exhaustion “represents the basic individual stress dimension of burnout It refers to feelings of being overextended and depleted of one’s emotional and physical resources” (Maslach, Schaufeli, & Leiter, 2001, p 399) Cynicism “(or depersonalization) represents the interpersonal context dimension of burnout It refers to a negative, callous, or excessively detached response to various aspects of the job” (p 399) Professional efficacy “represents the self-evaluation dimension of burnout It refers to feelings of incompetence and a lack of achievement and productivity at work” (p.399)
Theoretical Framework: Job Satisfaction
Job satisfaction research began in the 1950s At that time monetary incentives were believed to be one of the largest motivating factors among workers Additionally, two types of human nature were identified as a basis for job satisfaction research The first type “viewed people as basically lazy and work-shy, and held that motivating them is a matter of external stimulation The other view suggested that people are motivated to work well for its own sake, as well as for the social and monetary benefits they received, and that their motivation is internally stimulated” (Bassett-Jones & Lloyd, 2005, p.930)
Herzberg (1959) developed the two-factor theory or the motivation-hygiene theory, as an alternative to the current job attitude hypotheses in 1959 The first set of factors is referred to as hygiene, referencing external circumstances that affect job satisfaction The second set of factors is motivational, referring to internal factors within a worker There are six motivational, or internal, variables that include: achievement, recognition, work itself, responsibility, advancement, and the possibility of growth Hygiene variables, or external variables, include: company policy, supervision, relationship with supervisors, work conditions, relationship with peers, salary, personal life, relationship with subordinates, status, and job security (Ruthankoon & Ogunlana, 2003) Herzberg (1959) describes how hygiene, external, variables reflect job dissatisfaction, whereas motivational, internal, variables are responsible for job satisfaction Herzberg goes on to clarify that there is a one-way relationship between the two sets of factors Hygiene, external, factors can lead to job dissatisfaction if negative levels exist However, hygiene factors cannot cause job satisfaction, even if positive levels exist Motivational, internal, factors can lead to job satisfaction if positive levels exist, but cannot cause dissatisfaction even if negative levels exist
Trang 3Hygiene (External)
Factors
Motivational (Internal)
Factors
Job Dissatisfaction
Negative Levels
Levels
Positive
Job Satisfaction
Figure 1 Motivation-Hygiene Theory
Herzberg (1959) used critical incident analysis to test his theory, which was a new method of data collection at the time The use of this type of measurement sparked replication of motivation-hygiene research, and “a pattern emerged The motivation-hygiene theory provided an alternative approach to understanding job satisfaction and motivation, proposing that two types of factors influence employee job satisfaction The importance of having satisfied employees is obvious in its implication for higher productivity and lower turnover This theory can be adapted and applied without limitation to industries, although results are subject to interpretation, and measurement tools need to be adapted accordingly Past research, with adapted survey measurement tools are not as consistent, as demonstrated in Ruthankoon and Ogunlana’s (2003) study For that reason other measurement tools have been developed as a more standard survey in measuring job satisfaction This study will utilize Smith, Kendall, and Hulin’s (1969) abridged Job Descriptive Index and Job In General scales
Theoretical Framework: Role Theory
Role theory has been discussed since the early 1960s by researchers including Kahn, Wolfe, Quinn, Snoek, and Rosenthal (1964), and Katz and Kahn (1966), as well as into the 1970s and 1980s by Rizzo, House, and Lirtzman (1970), Katz and Kahn (1978), and Jackson and Schuler (1985) “According to the role theory, responsibilities of all employees and [their] positions at work should be defined Only under these circumstances, can managers direct employees; and, in turn, employees can report on their work and responsibilities” (Karadal, Ay,
& Cuhadar, 2008, p.176)
Katz and Kahn (1978) argued that the division of labor principle necessarily requires employers to enact specific work roles in order for employees to perform their tasks efficiently and effectively They go on to describe
an organization as an essential network of employees that performs specific roles that are “expected” and “required”
by others in the institution If employees perform “unexpected” tasks, repercussions can be anticipated These repercussions may compromise employee commitment and performance (Katz & Kahn, 1966, 1978)
Schuler et al (1977) suggest that role conflict and role ambiguity “are usually associated with negatively valued states; e.g., tension, absenteeism, low satisfaction, low job involvement, [and] low expectancies (p 125) In addition, Jackson and Schuler (1985) also support that job satisfaction is negatively related to role conflict and role ambiguity Koustelios, Theodorakis, and Goulimaris (2004) also conclude that both role conflict and role ambiguity are common characteristics that impact job satisfaction Tracy and Johnson (1981) conclude that “The role conflict and role ambiguity scales developed by Rizzo, House, and Lirtzman (1970) are the most commonly used instruments for measuring these two variables in work settings” (p 464) This study will utilize Rizzo, House, and Lirtzman’s (1970) measures
Theoretical Framework: Burnout
Burnout research originated with Freudenberger (1974) who stated the dictionary definition of burnout as “to fail, wear out or become exhausted by making excessive demands on energy, strength, or resources” (Freudenberger,
1974, p 159) Burnout was first noticed consistently within the healthcare and human services fields, as employees were more emotionally drained when dealing directly with others (Maslach, Schaufeli, & Leiter, 2001) Maslach and Jackson (1981), considered burnout to be “a syndrome of emotional exhaustion and cynicism that occurs frequently among individuals who do ‘people-work’ of some kind” (p 99) For burnout measurement purposes, they defined three
Trang 4H 6
the three dimensions of burnout could exist where exhaustion could lead to cynicism resulting in a lack of personal accomplishment
Though other researchers suggested two or four factor models to measure burnout, “currently, the Maslach Burnout Inventory (MBI) [using the three factor approach] is the most widely used burnout instrument whose development has significantly contributed to research of the phenomenon” (Densten, 2001, p 833) Burnout has been linked to poor job satisfaction (Marinelli, 1992; Maslach, Jackson, & Leiter, 1996; Razza, 1993; Singh, Goolsby, & Rhoads, 1994), low organizational commitment (King & Sethi, 1997), intention to quit (Maslach, Jackson, & Leiter, 1996), and attrition (Burke & Richardsen, 1996; Drake & Yadama, 1996) Schaufeli and Leiter (2001) state that the
“social focus of burnout, the solid research basis concerning the syndrome, and its specific ties to the work domain make a distinct and valuable contribution to people’s health and well-being” (Schaufeli & Leiter, 2001, p 397)
Furthermore, Koesten (2005) asserts that the Maslach Burnout Inventory using the three factor approach “has been widely validated across professions” (Koesten, 2005, p 66) Therefore, Maslach’s General Survey was developed to measure burnout across different populations Breward and Clippard (2002) describe the many different populations where burnout research has been done, including health professionals, teachers, police officers, customer service personnel, social workers, and attorneys This shows the applicability that the Maslach Burnout Inventory has for future research This study will utilize Maslach’s General Survey
Research Hypotheses
Six research hypotheses will be used to determine the relationships that may exist between demographics of financial advisors and job satisfaction, the independent variable; role conflict and role ambiguity, the mediating variables; and burnout, the dependent variable
Hypothesis 1 (H1): Demographic characteristics of financial advisors have a significant explanatory relationship to role stressors (role
conflict and role ambiguity)
Hypothesis 2 (H2): Demographic characteristics of financial advisors have a significant explanatory relationship to job satisfaction Hypothesis 3 (H3): Demographic characteristics of financial advisors have a significant explanatory relationship to the dimensions of
burnout (exhaustion, cynicism, and professional efficacy)
Hypothesis 4 (H4): Demographic characteristics of financial advisors and role stressors (role conflict and role ambiguity) have a
significant explanatory relationship to the dimensions of burnout (exhaustion, cynicism, professional efficacy)
Hypothesis 5 (H5): Demographic characteristics of financial advisors and job satisfaction have a significant explanatory relationship
to the dimensions of burnout (exhaustion, cynicism, and professional efficacy)
Hypothesis 6 (H6): Demographic characteristics of financial advisors, role stressors (role conflict and role ambiguity), and job
satisfaction have a significant explanatory relationship to burnout (exhaustion, cynicism, professional efficacy)
Figure 2 Hypothesized Research Model Methodology
A quantitative, non-experimental, explanatory (correlational) survey, research design will be used to test the relationships proposed in the hypothesized model The hypothesized model proposes relationships between demographics, role conflict and role ambiguity, job satisfaction, and burnout among financial advisors According to the Department of
H 5
H 4
H 6
Trang 5Labor (2007), the second largest concentration of financial advisors in the United States is located in South Florida; therefore the target population for the proposed study is financial advisors in South Florida The accessible population is financial advisors employed by financial firms in Broward County and Palm Beach County, Florida The proposed research will consist of a non-random, non-systematic, convenience sample of financial advisors Financial advisors will
be invited to participate, if they are over 20 years of age, have a Series 7 license, can read and write the English language, and have been with their firm for at least three months
According to Green (1991), the sample size should be determined using the formula 50 + 8k (where k is the number of predictor variables) In this study, the six demographic measures combined with the two role stressors and the five job satisfaction measures equal thirteen Thirteen multiplied by eight equals 104, added to 50 equals a total of 154 participants needed The sample size appropriate for this research is 154 usable responses to perform multiple regressions
This research study will distribute a four part questionnaire combining the three specified measurement tools: Maslach’s General Survey (1996), Smith, Kendall, and Hulin’s (1969) abridged version of the Job Descriptive Index and the Job In General scales, and Rizzo, House, and Lirtzman’s (1970) role conflict and role ambiguity measures, along with six demographic questions The demographic questions will address gender, age, marital status, education, work experience, and race All questions except for the demographic profile will be measured on a Likert-type response scale Role conflict, role ambiguity, and burnout are all measured on a 7-point Likert scale, while the abridged Job Descriptive Index (JDI) and Job In General (JIG) scales are measured with “yes”, “no”, and “?” categories The measurement tools used from Maslach (1996), Smith et al (1969), and Rizzo et al (1970) will not be altered in structure or order Maslach’s General Survey has reliability measures of 90 for exhaustion, 79 for cynicism, and 71 for professional efficacy Smith et al.’s abridged JDI and JIG scales have reliability measures for work at 84, pay at 75, promotion at 82, supervision at 83, and coworkers at 76
Exploratory factor analysis and coefficient alpha will test for instrument reliability Pearson’s correlation will explore the bivariate relationship between all variables Multiple, regression analyses will test the affect and relationship among all predictor variables (demographic characteristics, roles stressors (role conflict and role ambiguity), job satisfaction) that result in burnout (dependent variables of exhaustion, cynicism, professional efficacy) Multiple regressions will test Hypotheses 1 through 6 to determine research results
Proposed Results and Conclusions
Data collection has begun in South Florida and is expected to conclude in early October of 2009 This study has the potential to reveal job satisfaction levels and role conflict and ambiguity levels on an understudied population, and how these variables affect the current level of burnout among financial advisors Furthermore, individual levels of burnout will be obtained to reveal new insights into the changing profession of the financial advisor The recent progression towards a more “counselor-type” role makes this research even more essential to the health and well-being of the financial industry With the recent added stress of the financial markets, mergers and acquisitions, and regulatory concerns, it is important to understand the dynamics of this growing profession and to find out how financial employers can sustain successful business practices to retain satisfied, efficient financial advisors to serve the everyday consumer
LIMITATIONS OF THE STUDY AND FUTURE STUDIES
This study is intended to research role conflict, role ambiguity, job satisfaction, and burnout among financial advisors in the South Florida area The combination of these variables could provide insightful results that have the potential to provide guidance to financial employers This study is not meant to be a comprehensive analysis of the financial workplace, but to serve as a starting point for future research within this understudied population Additional research should replicate these measures and expand to include others variables such as organizational commitment, job stress, emotional intelligence, turnover, and intention to turnover
The theoretical framework utilizing Herzberg’s (1959) motivation-hygiene theory, the role theory by Katz and Kahn (1966, 1978) and Maslach’s Burnout Inventory (1981) provide internal validity strengths as they are applied to an understudied population In addition, the corresponding measurement tools have high reliability statistics and have been used throughout much of the empirical literature External validity strengths include the high concentration of financial advisors in the selected research area and the diversity of expected financial advisor participation Weaknesses to validity include the current economic condition of financial markets and the economy, as well as unprecedented organizational restructurings including, bankruptcy, mergers, and acquisitions within the financial industry It is recommended that this
Trang 6REFERENCES
Angerer, J.M (2003) Job burnout Journal of Employment Counseling, 40, 98-107 Retrieved September 16, 2007 from Business Source Premier database
Bassett-Jones, N., & Lloyd, G.C (2005) Does Herzberg’s motivation theory have staying power? The Journal of Management Development,
24(10), 929- 943 Retrieved December 8, 2007 from ProQuest database
Beehr, T.A., Walsh, J.T., & Taber, T.D (1976) Relationship of stress to individually and organizationally valued stress; Higher order needs as a
moderator Journal of Applied Psychology, 61, p.41-47 Retrieved February 21, 2009 from ProQuest database
Bhanugopan, R., & Fish, A (2006) An empirical investigation of job burnout among expatriates Personnel Review, 35(4), 449-468
Brewer, E.W., & Clippard, L.F (2002) Burnout and job satisfaction among student support services personnel Human Resource Development
Quarterly, 13(2), 169-186 Retrieved September 5, 2007 from ProQuest database
Chang S., & Lee, M-S (2006) Relationships among personality traits, job characteristics, job satisfaction and organizational commitment The
Business Review, 6(1), 201-207 Retrieved on February 21, 2009 from ProQuest database
Cheng, C (2007) A research study of Frederick Herzberg’s motivator-hygiene theory on continuing education participants in Taiwan Journal of
American Academy of Business, Cambridge, 12(1), 186-192 Retrieved December 9, 2007 from ProQuest database
Cordes, C.L., & Dougherty, T.W (1993) A review and an integration of research on job burnout The Academy of Management Review, 18(4),
621-656 Retrieved on September 28, 2007 from Lynn Library
Debnath, S.C., Tandon, S., & Pointer, L.V (2007) Designing business school courses to promote student motivation: an application of the job
characteristics model Journal of Management Education, 31(6), 812-831 Retrieved December 12, 2008 from ProQuest database
Densten, I (2001) Re-thinking burnout Journal of Organizational Behavior, 22(8), 833-847 Retrieved September 16, 2007 from ProQuest database
Dillman, D.A (2000) Mail and internet surveys: The tailored design method (2 ed.) New York: John Wiley
Etzion, D (1988) The experience of burnout and work/non-work success in male and female engineers: A matched-pairs comparison Human
Resource Management (1986-1998), 27(2), 163-179 Retrieved September 5, 2007 from ProQuest database
Gorter, R.C., Albrecht, G., Hoogstraten, J., & Eijkman, M.A.J (1999) Factorial validity of the maslach burnout inventory – Dutch version (MBI-
NL) Journal of Organizational Behavior, 20(2), 209-217 Retrieved September 5, 2007 from ProQuest database
Green, S B (1991) How many subjects does it take to do a regression analysis? Multivariate Behavioral Research, 26, 499-510
Herzberg, F.I., Mausner, B., & Snyderman, B (1959) The motivation to work (2 ed.) New York: John Wiley
Introduction to SAS UCLA: Academic Technology Services, Statistical Consulting Group From http://www.ats.ucla.edu/stat/sas/notes2/
(accessed May 21, 2009)
Karadal, H., Ay, U., & Cuhadar, M.T (2008) The effect of role conflict and role ambiguity on job satisfaction and organizational commitment:
A study in the public and private sectors The Journal of American Academy of Business, Cambridge, 13(2), p 176-181 Retrieved April 30, 2009
from ProQuest database
Koesten, J (2005) Reducing stress and burnout for financial planners Journal of Financial Planning, 64-74 Retrieved September 5, 2007 from ProQuest database
Koustelios, A., Theodorakis, N., & Goulimaris, D (2004) Role ambiguity, role conflict and job satisfaction among physical education teachers in
Greece The International Journal of Educational Management, 18(2/3), p 87-92 Retrieved April 30, 2009 from ProQuest database Kumar, S (2008) Job satisfaction among psychiatrists: An urgent area for research Mental Health Review Journal, 13(3), 16-23 Retrieved on
December 12, 2008 from ProQuest database
Leach, F.J., & Westbrook, J.D (2000) Motivation and job satisfaction in one government research and development environment Engineering
Management Journal, 12(4), 3-8 Retrieved December 9, 2007 from ProQuest database
Lee-Ross, D (2002) An exploratory study of work motivation among private and public sector hospital chefs in Australia Journal of
Management Development, 21(7/8), 576-588 Retrieved December 12, 2008 from ProQuest database
Lin, S-C., & Chang, J-N (2005) Goal orientation and organizational commitment as explanatory factors of employee’s mobility Personnel
Review, 34(3), 331-385 Retrieved on December 7, 2007 from ProQuest database
Maslach, C., & Jackson, S.E (1981) The measurement of experienced burnout Journal of Occupational Behaviour, 2, 99-113 Retrieved
September 15, 2007
Maslach, C., Jackson, S.E., & Leiter, M.P (1996) Maslach Burnout Inventory Manual (3rd ed.) Palo Alto, CA: Consulting Psychologists Press, Inc
Maslach, C., Schaufeli, W.B., & Leiter, M.P (2001) Job burnout Annual Review of Psychology 52, 397-422 Retrieved September 15, 2007
from ProQuest database
Melvin, J (1993) Design and the creation of job satisfaction Facilities, 11(4), 15-19 Retrieved December 7, 2007 from ProQuest database
Rizzo, J.R., House, R.J., & Lirtzman, S.I (1970) Role conflict and ambiguity in complex organizations Administrative Science Quarterly, 15(2), p 150-163
Ruthankoon, R., & Ogunlana, S.O (2003) Testing Herzberg’s two-factor theory in the Thai construction industry Engineering, Construction and
Architectural Management, 10(5), 333-341 Retrieved December 8, 2007 from ProQuest database
Smith, C S., Tisak, J., & Schmieder, R A (1993) The measurement properties of the role conflict and role ambiguity scales: A review and extension of the empirical
research Journal of Organizational Behavior, 14(1), p 37-48 Retrieved April 30, 2009 from ProQuest database
Smith, P.C., Kendall, L.M., & Hulin, C.L (1969) The measurement of satisfaction in work and retirement: A strategy for the study of attitudes
Rand McNally Psychology Series, Rand McNally & Company
Ting, Y (1997) Determinants of job satisfaction of federal government employees Public Personnel Management, 26(3), 313-334 Retrieved
February 24, 2009 from ProQuest database
Toppinen-Tanner, S., Kalimo, R., & Mutanen, P (2002) The process of burnout in white-collar and blue-collar jobs: Eight-year prospective study
of exhaustion Journal of Organizational Behavior, 23(5), 555-570 Retrieved September 5, 2007 from ProQuest database
Tracy, L., & Johnson, T W (1981) What do the role conflict and role ambiguity scales measure? Journal of Applied Psychology 66(4),
p.464-469) Retrieved May 10, 2009 from ProQuest database
Walper, G.H Jr., & McBreen, C.S (2006) The shape of things to come: Advisers being seen as counselors The growth of financial planning These trends are set to gain momentum this year Are you ready? On Wall Street, New York: March 1, 2006, 1 Retrieved November 11, 2007
from ProQuest database
Wikipedia The Free Encyclopedia (November 11, 2007) Financial Planner Retrieved November 11, 2007 from http://en.wikipedia.org/wiki/ Financial_planner Wright, T.A., & Hobfoll, S.E (2004) Commitment, psychological well-being and job performance: an examination of conservation of resources (COR) theory and
job burnout Journal of Business and Management, 9(4), 389-406 Retrieved on October 2, 2007 from ProQuest database
Trang 7Reproduced with permission of the copyright owner Further reproduction prohibited without permission.