问题描述：
英语翻译
The subject of this paper was the exploration of the effects of family ties on migration,of the effects of migration decisions in the presence of such
ties on employment and earnings of family members and on family
stability.Ties are defined only in relation to migration decisions.In the
case of a single (aggregated) destination,ties exist when individual
(private) gains of family members differ in sign.The tied person is one
whose gain (or loss) is smaller in absolute value.In the more general case
of several potential destinations,ties exist so long as the gain of at least one
spouse in the family's optimal location is less than his or her private
maximum.In this case both spouses can be tied,although the discrepancy
from the private optimum is likely to be larger for the spouse with the
smaller gain.Indeed,the discrepancy is a measure of the magnitude of
the tie.It is a measure of the negative externality which the decision to
move (or to stay) imposes on the family members in their individual
capacities.
These externalities are usually,but not always,internalized by the
family.They are absorbed without undermining family integrity so long
as the sum of the ties is less than the gains from marriage.Otherwise,
the family dissolves and at least one person moves.The theorem that
families move whenever family gain is positive and stay when it is negative
must,therefore,be amended.The sign of the family gain is a necessary,
but not sufficient,condition for the decisions to move or not to move as a
family.
The presence of family ties deters migration of families,even though it
creates tied movers as well.Since gains or losses from migration are
mainly attributable to job mobility,two-earner families are more likely to
be deterred than single-earner families.Single earners in husband-wife
families are almost always men,so it is families with working wives whose
migration is most likely to be inhibited.
注：这是一篇论文的一部分,请不要用在线翻译工具直接翻译.
（偶然间在朋友处得到这篇论文,对这段非常感兴趣,想自己研究一下,怎奈英文实在不好,来请教一哈.）
我先翻译一句：
该论文旨在探讨家庭关系对移民的影响和目前移民的决定对家庭成员的工作、收入及家庭稳定性的影响…… 请接着来~
The subject of this paper was the exploration of the effects of family ties on migration,of the effects of migration decisions in the presence of such
ties on employment and earnings of family members and on family
stability.Ties are defined only in relation to migration decisions.In the
case of a single (aggregated) destination,ties exist when individual
(private) gains of family members differ in sign.The tied person is one
whose gain (or loss) is smaller in absolute value.In the more general case
of several potential destinations,ties exist so long as the gain of at least one
spouse in the family's optimal location is less than his or her private
maximum.In this case both spouses can be tied,although the discrepancy
from the private optimum is likely to be larger for the spouse with the
smaller gain.Indeed,the discrepancy is a measure of the magnitude of
the tie.It is a measure of the negative externality which the decision to
move (or to stay) imposes on the family members in their individual
capacities.
These externalities are usually,but not always,internalized by the
family.They are absorbed without undermining family integrity so long
as the sum of the ties is less than the gains from marriage.Otherwise,
the family dissolves and at least one person moves.The theorem that
families move whenever family gain is positive and stay when it is negative
must,therefore,be amended.The sign of the family gain is a necessary,
but not sufficient,condition for the decisions to move or not to move as a
family.
The presence of family ties deters migration of families,even though it
creates tied movers as well.Since gains or losses from migration are
mainly attributable to job mobility,two-earner families are more likely to
be deterred than single-earner families.Single earners in husband-wife
families are almost always men,so it is families with working wives whose
migration is most likely to be inhibited.
注：这是一篇论文的一部分,请不要用在线翻译工具直接翻译.
（偶然间在朋友处得到这篇论文,对这段非常感兴趣,想自己研究一下,怎奈英文实在不好,来请教一哈.）
我先翻译一句：
该论文旨在探讨家庭关系对移民的影响和目前移民的决定对家庭成员的工作、收入及家庭稳定性的影响…… 请接着来~
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