Table:
explanatory variables, prior to entry into export markets
growth of r&d intensity
change in the growth of r&d intensity

small firms
large firms
small firms
large firms

export-starter dummy

coefficient
0.052
0.236
0.043
-0.173

standard error
0.020
0.247
0.029
0.186

extramural r&d dummy, using asm data

coefficient
-0.045
-0.337
-0.009
0.018

standard error
0.014
0.191
0.022
0.086

relative extramural r&d intensity, using asm data

coefficient
-0.041
0.004
-0.017
-0.043

standard error
0.005
0.010
0.013
0.018

foreign-owned

coefficient
0.026
-0.071
0.015
-0.217

standard error
0.046
0.173
0.077
0.154

age

coefficient
0.001
-0.005
-0.002
0.003

standard error
0.001
0.010
0.002
0.007

relative labour productivity

coefficient
0.005
0.030
0.009
0.009

standard error
0.009
0.041
0.015
0.024

relative employment

coefficient
0.007
-0.004
-0.003
0.003

standard error
0.006
0.005
0.009
0.006

number of observations
16,843
576
16,843
576

r-squared
0.048
0.098
0.005
0.059

adusted r-squared
0.04670
0.05330
0.00361
0.01240

Based on this table picture, can you identify any merged cells and give their coordinates in the JSON format {'top-left':(x, y), 'bottom-right':(z, w)}, where (x, y) and (z, w) correspond to the top-left and bottom-right (row_id, column_id) of the merged area? The row_id and column_id should start from 1 rather than 0.

The merged cell regions are as follows:
{'top-left':(1, 1), 'bottom-right':(2, 1)}
{'top-left':(1, 2), 'bottom-right':(1, 3)}
{'top-left':(1, 4), 'bottom-right':(1, 5)}
{'top-left':(3, 2), 'bottom-right':(3, 5)}
{'top-left':(6, 2), 'bottom-right':(6, 5)}
{'top-left':(9, 2), 'bottom-right':(9, 5)}
{'top-left':(12, 2), 'bottom-right':(12, 5)}
{'top-left':(15, 2), 'bottom-right':(15, 5)}
{'top-left':(18, 2), 'bottom-right':(18, 5)}
{'top-left':(21, 2), 'bottom-right':(21, 5)}.