Suppose {Xi, i≥l } and {Yi, i≥l } are two independent sequences with distribution functions Fx(x) and Fr(x), respectively. Zi,n is the combination of Xi and Y1 with a probability pn for each i with 1≤i≤<_n. The...Suppose {Xi, i≥l } and {Yi, i≥l } are two independent sequences with distribution functions Fx(x) and Fr(x), respectively. Zi,n is the combination of Xi and Y1 with a probability pn for each i with 1≤i≤<_n. The extreme value distribution Gz(x) of this particular triangular array of the i.i.d, random variables Z1,n, Z2.n ,..., Zn.n is discussed. We found a new form of the extreme value distribution A^A(px)A(x)(0＜p＜1), which is not max-stable. It occurs if Fx(x) and Fr(x) belong to the same MDA(A). Gz(x) does not exist as mixture forms of the different types of extreme value distributions.展开更多
Mutual funds are usually classified on the basis of their objectives. If the activities of mutual funds are consistent with their stated objectives, investors may look at the latter as signals of their risks and incom...Mutual funds are usually classified on the basis of their objectives. If the activities of mutual funds are consistent with their stated objectives, investors may look at the latter as signals of their risks and incomes. This work analyzes mutual fund objective classification in China by statistical methods of distance analysis and discriminant analysis; and examines whether the stated investment objectives of mutual funds adequately represent their attributes to investors. That is, if mutual funds adhere to their stated objectives, attributes must be heterogeneous between investment objective groups and homogeneous within them. Our conclusion is to some degree, the group of optimized exponential funds is heterogeneous to other groups. As a whole, there exist no significant differences between different objective groups; and 50% of mutual funds are not consistent with their objective groups.展开更多
Based on statistical analysis,this paper states that four types of rural infrastructure as roads,electricity, communications,and education have statistically significant effects on agricultural production,nonagricultu...Based on statistical analysis,this paper states that four types of rural infrastructure as roads,electricity, communications,and education have statistically significant effects on agricultural production,nonagricultural production,and farmers’income in China.However,the specifics and the degrees of these influences are different. Therefore, different policies have to be implemented respectively to make full use ofthe limited funds in China. Meanwhile, the maturity level of rural infrastructure as with rural economic development has regional discrepancy. The levels of maturity decrease from east to west.It is urgent that the current weak situation of the ruralinfrastruc- ture in western China needs to be improved.展开更多
文摘Suppose {Xi, i≥l } and {Yi, i≥l } are two independent sequences with distribution functions Fx(x) and Fr(x), respectively. Zi,n is the combination of Xi and Y1 with a probability pn for each i with 1≤i≤<_n. The extreme value distribution Gz(x) of this particular triangular array of the i.i.d, random variables Z1,n, Z2.n ,..., Zn.n is discussed. We found a new form of the extreme value distribution A^A(px)A(x)(0＜p＜1), which is not max-stable. It occurs if Fx(x) and Fr(x) belong to the same MDA(A). Gz(x) does not exist as mixture forms of the different types of extreme value distributions.
文摘Mutual funds are usually classified on the basis of their objectives. If the activities of mutual funds are consistent with their stated objectives, investors may look at the latter as signals of their risks and incomes. This work analyzes mutual fund objective classification in China by statistical methods of distance analysis and discriminant analysis; and examines whether the stated investment objectives of mutual funds adequately represent their attributes to investors. That is, if mutual funds adhere to their stated objectives, attributes must be heterogeneous between investment objective groups and homogeneous within them. Our conclusion is to some degree, the group of optimized exponential funds is heterogeneous to other groups. As a whole, there exist no significant differences between different objective groups; and 50% of mutual funds are not consistent with their objective groups.
文摘Based on statistical analysis,this paper states that four types of rural infrastructure as roads,electricity, communications,and education have statistically significant effects on agricultural production,nonagricultural production,and farmers’income in China.However,the specifics and the degrees of these influences are different. Therefore, different policies have to be implemented respectively to make full use ofthe limited funds in China. Meanwhile, the maturity level of rural infrastructure as with rural economic development has regional discrepancy. The levels of maturity decrease from east to west.It is urgent that the current weak situation of the ruralinfrastruc- ture in western China needs to be improved.
