In contrast, Egyptologists such as Barbara Bell believe that an economic catastrophe such as a famine or a long lasting drought affected Egypt around this time. Therefore, to address the problem of feeding the Egyptian population, Nynetjer split the realm into two and his successors ruled two independent states until the famine came to an end. Bell points to the inscriptions of the Palermo stone, where, in her opinion, the records of the annual Nile floods show constantly low levels during this period. Bell's theory is now refuted by Egyptologists such as Stephan Seidlmayer, who corrected Bell's calculations. Seidlmayer has shown that the annual Nile floods were at their usual levels at Nynetjer's time up to the period of the Old Kingdom. Bell had overlooked that the heights of the Nile floods in the Palermo Stone inscriptions only takes into account the measurements of the nilometers around Memphis, but not elsewhere along the river. Any long-lasting drought is therefore less likely to be an explanation.