Employee psychological factorAge productivity factor . Given that older individuals are less productive, an aging working population can lower productivity growth. If senior workers' wages exceed their productivity levels, their wages may have to be reduced to increase their employability. Thus, the removal of seniority wage systems to any organizations that may be a condition that is required to allow to raise productivity growth. However, the other causal factors to any organizational productivity differentials include physical abilities, mental abilities, education and job experience form an individual labor's productivity potential. Combined with the firm's characteristics, these factors determines job performance. So, the weight of the different causal factors in determining individual productivity is changing, where mental abilities and education have long been growing in importance, when physical abilities have become less important. Continuously changing types of work can imply that the ability to absorb new information is becoming increasingly important relative to having long experience. Due to every young and older labor whose mental and/or physical abilities are difference, also it is reasonable to reduce speed abilities, when any labor individual age will be grown to be older age from young age, as who has been working in the same firm. So managers need to concern how to arrange and manage every team of the numbers of young and old age labor in order to achieve their team productivity abilities won't be declined, due to the unsuitable arrangement of every team's young and older labor team member numbers will cause the deparmtent to give poor efforts to deal their job duties inefficiently and also causes the productivity result ineffectively. So, manager can not neglect the absolute young and old member numbers arrangement in every department team in order to avoid the poor productivity and inefficiency in the result.Economists often emphasize that "incentives matter". The basic "law of behavior" is that higher incentive will lead to move effort and higher performance. In recent year, the use of incentives in behavioral interventions has become more popular to any organization individual staffs or clients. For example, the methods include that: Can any schools raise financial incentives to increase every student attendance, for reading, or for better grades? Will financial incentives encourage higher contributions to public products, like blood donations?