Pandemic's Effect On LC

Less LC Settled for the last week of January,
Checked data for fabrics, yarn and capital machinery.
Data might be incomplete
Effect of Corona was not neat.

This week I tried to look at the settled LCs of some selected import items in order to get an idea of Coronavirus’ influence on these items.

Source: Bangladesh Bank

This time, thanks to Bangladesh Bank website, I managed to get data for January 2020; however, the fifth week data was based on January 24 information. So it is not clear whether the fifth week data captures the whole fifth week or a fraction of it. So it is highly unlikely to say the last week of January data hints on Coronavirus effect.

Similarly , I did not manage to get the data on the first week of February. It was not available at Bangladesh Bank website. Selected import items are rice, fabrics, cotton yarn, capital machinery, other machinery. But I constructed following regression functions for three items:

Total LC_i = a + b fabrics_i + D_i
Total LC_i = a + b cotton_i + D_i
Total LC_i = a + b CapMac_i + D_i
Where Total LC_i= Total LC settled in week i;
fabrics_i= LC settled for fabrics in week i;
cotton_i = LC settled for cotton in week i;
CapMac_i= LC settled for Capital Machinery in week i;
D_i= 0 for weeks prior to Coronavirus outbreak;
=1 for weeks after Coronavirus outbreak;
Third week of January was identified as the beginning of outbreak. Unfortunately for each of the regression function, individual model did not fit well. Moreover, individual parameter did not turn out to be significant.
Following table reported the stat:

None of the coefficients turned out to be significant at 5% level. Please note no prior diagnostic check was carried out.
So effect of Coronavirus outbreak could not be seen on these items. A visual inspection of the graph shows, settled LCs for all the items registered decline in fifth week. However, it was not known whether the decline was stemming from non-availability of complete data or coronavirus effect.