Question: During which time period did the Corded Ware culture come to Norway?
About the article "Norway", section "Bronze Age".

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There have been many different views concerning the origin of the Corded Ware culture.
There is broadly a division between archaeologists who see an influence from pastoral societies of the steppes north of the Black Sea and those who think that Corded Ware springs from central Europe.
In both camps, there are many differing views.
The recent tendency has been to seek a middle way.
The distribution of the Corded Ware culture coincides in part with the earlier Funnelbeaker culture, with which it shares a number of features, such as cord impressions on pottery, and the use of horses and wheeled vehicles, that can be ultimately traced to the cultures of the European steppe.
In places a continuity between Funnelbeaker and Corded Ware can be demonstrated, whereas in other areas Corded Ware heralds a new culture and physical type.
On most of the immense, continental expanse that it covered, the culture was clearly intrusive, and therefore represents one of the most impressive and revolutionary cultural changes attested by archeology.
The degree to which cultural change generally represents immigration is a matter of debate, and such debate has figured strongly in discussions of Corded Ware.
Corded Ware ceramic forms in single graves develop earlier in area that is now Poland than in western and southern Central Europe.
The earliest radiocarbon dates for Corded Ware come from Kujavia and Małopolska in central and southern Poland and point to the period around 3000 BC.
(It must be noted that this study is limited to Middle Europe.)
Carbon-14 dating of the remaining central European regions shows that Corded Ware appeared after 2880 BC It spread to the Lüneburger Heide and then further to the North European Plain, Rhineland, Switzerland, Scandinavia, the Baltic region and Russia to Moscow, where the culture met with the pastoralists considered indigenous to the steppes.
In the western regions this revolution has been proposed to be a quick, smooth and internal change that occurred at the preceding Funnelbeaker culture, having its origin in the direction of eastern Germany.
Whereas in the area of the present Baltic states and Kaliningrad Oblast (former East Prussia), it is seen as an intrusive successor to the southwestern portion of the Narva culture.
In summary, Corded Ware does not represent a single monolithic entity, but rather a diffusion of technological and cultural innovations of different, contemporaneous peoples, living in close proximity to each other and leaving different archaeological remains. 
In their large-scale study on radiocarbon dating of the Bell Beakers, J. Müller and S. Willingen established that the Bell Beaker Culture in Central Europe started after 2500 BC.
Two great coexisting and separate Central European cultures – the Corded Ware with its regional groups and the Eastern Group of the Bell Beaker Culture – form the background to the Late Copper Age and Early Bronze Age.
Their development, diffusion and long range changes are determined by the great river systems.
As a third component counts the indigenous Carpathian Makó/Kosihy-Caka culture.
The Bell Beaker settlements are still little known, and have proved remarkably difficult for archaeologists to identify.
This allows a modern view of Bell Beakers to contradict results of anthropologic research.
The modern view is that the Bell Beaker people, far from being the "warlike invaders" as once described by Gordon Childe (1940), added rather than replaced local late Neolithic traditions into a cultural package and as such did not always and evenly abandon all local traditions.
More recent extensive DNA evidence, however, suggests a significant replacement of earlier populations.
Bell Beaker domestic ware has no predecessors in Bohemia and Southern Germany, shows no genetic relation to the local Late Copper Age Corded Ware, nor to other cultures in the area, and is considered something completely new.
The Bell Beaker domestic ware of Southern Germany are not as closely related to the Corded Ware as would be indicated by their burial rites.
Settlements link the Southern German Bell Beaker culture to the seven regional provinces of the Eastern Group, represented by many settlement traces, especially from Moravia and the Hungarian Bell Beaker-Csepel group being the most important.
In 2002 one of the largest Bell Beaker cemeteries in Central Europe was discovered at Hoštice za Hanou (Moravia, Czech Republic).
The relationship to the western Bell Beakers groups, and the contemporary cultures of the Carpathian basin to the south east, is much less.
The Bell Beaker culture settlements in Southern Germany and in the East-Group show evidence of mixed farming and animal husbandry, and indicators such as millstones and spindle whorls prove the sedentary character of the Bell Beaker people, and the durability of their settlements.
Especially some well-equipped child-burials seem to indicate sense of predestined social position, indicating a socially complex society.
However, analysis of grave furnishing, size and deepness of grave pits, position within the cemetery, did not lead to any strong conclusions on the social divisions.
The Late Copper Age is regarded as a continuous culture system connecting the Upper Rhine valley to the western edge of the Carpathian Basin.
Late Copper Age 1 was defined in Southern Germany by the connection of the late Cham Culture, Globular Amphora Culture and the older Corded Ware Culture of "beaker group 1" that is also referred to as Horizon A or Step A.
Early Bell Beaker Culture intruded This middle Bell Beaker Culture is the main period when almost all the cemeteries in Southern Germany begin.
Younger Bell Beaker Culture of Early Bronze Age shows analogies to the Proto-Únětice Culture in Moravia and the Early Nagyrév Culture of the Carpathian Basin.
During the Bell Beaker period a border runs through southern Germany, which divides culturally a northern from a southern area.
The northern area focuses on the Rhine area that belongs to the Bell Beaker West Group, while the southern area occupies the Danube river system and belongs to the homogeneous East Group which overlaps with the Corded Ware Culture and other groups of the Late Neolithic and of the earliest Bronze Age.
Nevertheless, southern Germany shows some independent developments of itself.
Although a broadly parallel evolution with early, middle and younger Bell Beaker Culture was detected, the Southern Germany middle Bell Beaker development of metope decorations and stamp and furrow engraving techniques do not appear on beakers in Austria-Western Hungary, and handled beakers are completely absent.
It is contemporary to Corded Ware in the vicinity, that has been attested by associated finds of middle Corded Ware (chronologically referred to as "beaker group 2" or Step B) and younger Geiselgasteig Corded Ware beakers ("beaker group 3" or Step C).
Bell Beaker Culture in Bavaria used a specific type of copper, which is characterized by combinations of trace elements.
This same type of copper was spread over the area of the Bell Beaker East-Group.
Previously archeology considered the Bell-beaker people to have lived only within a limited territory of the Carpathian Basin and for a short time, without mixing with the local population.
Although there are very few evaluable anthropological finds, the appearance of the characteristic planoccipital (flattened back) Taurid type in the populations of some later cultures (e.g.
Kisapostag and Gáta-Wieselburg cultures) suggested a mixture with the local population contradicting such archaeological theories.
According to archaeology, the populational groups of the Bell-beakers also took part in the formation of the Gáta-Wieselburg culture on the western fringes of the Carpathian Basin, which could be confirmed with the anthropological Bell Beaker series in Moravia and Germany.
In accordance with anthropological evidence, it has been concluded the Bell Beakers intruded in an already established form the southern part of Germany as much as the East Group area. 
This simple method of burial was used often by prehistoric peoples.
It was used during the Funnelbeaker culture and Corded Ware culture.
It was characteristic of the Urnfield culture which stored cremated remains in urns and buried them in flat graves.
Burial customs did not always follow a pattern of continuously increasing sophistication in history.
During the early La Tène culture the deceased were optionally cremated and then interred in tumulus tombs, but this changed during the later period.
At that time tumulus tombs became rare and the internment of cremated remains in flat graves was the dominant method of burial again. 
 "For the North-East European culture of similar name, see Pit–Comb Ware culture."
The Pitted Ware culture (ca 3200 BC– ca 2300 BC) was a hunter-gatherer culture in southern Scandinavia, mainly along the coasts of Svealand, Götaland, Åland, north-eastern Denmark and southern Norway.
Despite its Mesolithic economy, it is by convention classed as Neolithic, since it falls within the period in which farming reached Scandinavia.
It was first contemporary and overlapping with the agricultural Funnelbeaker culture, and later with the agricultural Corded Ware culture. 
Norway's coastline rose from glaciation with the end of the last glacial period about 12,000 BC.
The first immigration took place during this period as the Norwegian coast offered good conditions for sealing, fishing and hunting.
They were nomadic and by 9300 BC they were at Magerøya.
Increased ice receding from 8000 BC caused settlement along the entire coastline.
The Stone Age consisted of the Komsa culture in Troms and Finnmark and the Fosna culture further south.
The Nøstvet culture took over from the Fosna culture ca.
7000 BC, which adapted to a warmer climate which gave increased forestation and new mammals for hunting.
The oldest human skeleton ever discovered in Norway was found in shallow water off Sogne in 1994 and has been carbon dated to 6,600 BC.
Ca.
4000 BC people in the north started using slate tools, earthenware, skis, sleds and large skin boats.
The first farming and thus the start of the Neolithic period, began ca.
4000 BC around the Oslofjord, with the technology coming from southern Scandinavia.
The break-through occurred between 2900 and 2500 BC, when oats, barley, pigs, cattle, sheep and goats became common and spread as far north as Alta.
This period also saw the arrival of the Corded Ware culture, who brought new weapons, tools and the Indo-European language, from which the Norwegian language developed.