A regional perspective on the spatial concentration in Romania ’ s international trade in 2011

In this study, I aimed at analyzing the territorial structure of the international trade in Romania in 2011 on the level of each development region. Starting from the values of the export and import trade flows pertaining to each region of Romania and using statistical methods of analysis, we processed the existing data in order to determine the distribution of foreign trade and to emphasize the regional poles of competitiveness from this point of view. Since other indexes, such as the trade balance or the import/export coverage ratio, are also marks of competitiveness and of the increase or decrease in the performance of a certain economy, we also calculated these indexes for each region of the country. In order to statistically substantiate the existence of a certain degree of spatial concentration of the Romanian international trade in different regions of the country, we resorted to the boxplot graphical representation and to the Gini square and the Gini index respectively.


Introduction
When Romania joined the European Union, the statistics referring to the international trade in goods were established by adding the data from the Intrastat (trade within the EU) and the Extrastat (trade outside the EU) statistic systems.
The INTRASTAT system was created and developed within the European Union, being operated in Romania by the National Institute of Statistics, in order to collect data directly from the business operators in the member states which exchange goods with other member states of the European Union, while the EXTRASTAT system is operated by the National Customs Authority, since it is the institution that collected and processed the customs declarations, and the level of the imports and exports between Romania and other countries outside the European Union was established based on these declarations. 1e statistics for Romania's foreign trade are made up according to the methodology used on international level and according to this methodology the data collected for 2011 is provisional data.

Romania's FOB exports
Romania's FOB exports in 2011 were of 45,040,813 thousand euro, the top 3 regions, with exports of over 7 billiard, are: Bucharest Ilfov with 8,931,805 thousand Euro, which is 19.9% of the total exports of country, South Muntenia with 7,617,899 thousand Euro (17.0% of the total exports of the country) and the North-West region with 7,025,639 thousand Euro (15.7% of the total exports of country).

Figure 1. FOB exports for each development region in 2011
Source: processing of the data offered by DJS Bacau At the middle of the classification are listed 3 other regions which exported goods amounting between 4 and 7 billion euro: the West region with 6,559,602 thousand Euro representing 14.6% of the total exports of the country, the Central region with 5,775,127 thousand Euro (12.9% of the total exports of the country) and the South-East with 4,739,103 thousand Euro (10.6% of the total exports of the country), while on the last 2 places, far behind the other regions, with exports lower than 2.5 billion euro, are the following regions: South-West Oltenia with 2,251,038 thousand Euro (5.0% of the total exports of the country) and North-East with 1,968,564 thousand Euro (4.44% of the total exports of the country).

Romania's CIF imports
Romania's CIF imports in 2011 reached the amount of 54,823,559 thousand Euro.The region Bucharest-Ilfov is placed once again on top of the regions with the largest amount of imports: 20,409,827 thousand Euro, which represents 37.3% of the total imports in Romania, being followed by 2 other regions which import goods amounting to about 6.5 billion euro: the North-West with 6,883,851 thousand Euro has 12.6% of the total amount of imports and South Muntenia with 6,352,269 thousand Euro, which is 11.6% of the total amount of imports.

Figure 3. CIF imports for each development region in 2011
Source: processing of the data offered by DJS Bacau 3 other regions, with a value of imports amounting to about 5.5 billion euro, each recording over 10.0% of the total imports in the country, are listed at the middle in the hierarchy of the regions: the West region with 5,930,387 thousand Euro which represents 10.8% of the total imports in the country, the South-East with 5,615,786 thousand Euro (10.3% of the total imports in the country) and the Central region with 5,561,318 thousand Euro (10.2% of the total imports in the country).With percentages of under 4.0% of the total imports are the North-East region with 2,134,479 thousand Euro (3.9% of the total imports in the country) and South-West Oltenia with 1,829,736 thousand Euro (3.3% of the total imports in the country), the two of them being situated on the last places in the classification.The trade balance and the import/export coverage ratio All the export and import relationships of Romania with the rest of the world are better underlined in the trade balance, by calculating the balance of the foreign trade operations.Calculating this balance of the international trade operations (FOB-CIF) involved determining the difference between the exports materialized in the FOB prices and the imports materialized in CIF.

Figure 5. The balance of the FOB-CIF international trade operations (in thousands of euro) and the FOB-CIF coverage ratio (%) for each development region in 2011
Source: processing of the data offered by DJS Bacau In 2011, in Romania there was a negative balance of the foreign trade operations amounting to 9,782,786 thousand Euro.The highest negative balance was recorded in the region Bucharest-Ilfov (-11,478,022 thousand Euro) followed, at great distance, by the South-East region (-876,683 thousand Euro) and the North-East region (-165,915 thousand Euro).It can be noticed that in the other 5 regions the value of exports was higher than the value of the imports, the greatest surplus of the trade balance being recorded in South Muntenia (+1,265,630 thousand Euro), followed by the West region (+629,215 thousand Euro), South-West Oltenia (+421,302 thousand Euro), the Central region (+213,809 thousand Euro) and the North-West (+141,788 thousand Euro).
Alongside the trade balance, the import/export coverage ratio is another index which shows the efficiency of foreign trade.On the level of the whole country, the degree of import/export coverage ratio in 2011 was of 82,2%, a lower coverage ratio being recorded only in the Bucharest-Ilfov region.Consequently, the lowest coverage ratio, situated beyond the national average, was recorded in Bucharest-Ilfov (43.8%), while above the national average and below 100.0%were the South-East (84.4%) and the North-East (92.2%) regions.South-West Oltenia is on the first place in the hierarchy of the regions with the highest coverage ratio (123.0%), the second place belonging to South Muntenia (119.9%), and the third position to the West region (110.6%); on the next two places are the Central (103.8%) and the North-West (102.1%)regions.
After analyzing figures 2 and 4, we can notice that 52.6% of the total amount of exports, and 61.5% of the total amount of imports, were recorded in only 3 regions; thus, we may ask if there is a spatial concentration of the foreign trade into certain regions of the country.

Figure 2 .
Figure 2. The structure of exports for each development region in 2011 (%) Source: processing of the data offered by DJS Bacau

Figure 4 .
Figure 4. Structure of the imports in each development region in 2011(%) Source: processing of the data offered by DJS Bacau