The phrase "and thereby tend to" is correct and usable in written English.
It can be used to indicate that one action or condition leads to another, often implying a causal relationship.
Example: "The new policy encourages teamwork, and thereby tend to improve overall productivity."
Alternatives: "and thus tend to" or "and consequently tend to".
According to the CBO, the new penalties on employers who fail to offer health benefits "will initially reduce employers' demand for labor and thereby tend to lower employment". That sounds like a clear warning of job losses to come.
The older person specific instruments identified by this review reflect quality of life in a broader sense and thereby tend to address the majority of key domains previously highlighted as important to older people.
Sharon seems to imply that regression therapy further embeds the assumption that it is parents who have caused their child's illness (perhaps via the culturally prevalent and mistaken assumption that all psychological therapies focus on an individual's childhood and thereby tend to locate the 'origin' of the mental illness within the family).
Out of a sense-of-enough she is willing to share and thereby tends to eliminate the unjust distribution of wealth that creates the climate for violence.
Economic accumulation takes place over time and thereby tends to be greatest among older people (though this is not, of course, to say that all older people share in it).
It also denies the rural sector the much-needed human capital, reduces availability of farm labour (Ogwumike and Aramolaran, [2000]), and thereby tends to weaken productivity and income levels in the sector.
The lead contamination in the lake slowly but continuously influences the lead concentration in the river, and thereby tends to contaminate all the other small lakes (body tissues and organs including brain) with which the river comes in contact.
The increased mobility of the middle classes of many nations today has made foreign travel possible for more and more people, thereby tending to soften some of the very strong regional differences in design.
Major and minor elements thereby tended to react in the same direction.
A policy of encouraging growth has the effect of keeping the demand for imports high and making labour markets tight, thereby tending to push up money wage rates.
The wholly unex pected death of Nasser brought new leadership problems to the Arab world and also to its Soviet sponsor, thereby tending to freeze for an indefinite period the tenuous de facto armistice.
